%R 2010RMxAA..46....3R
%A Ruelas-Mayorga, A.; Sánchez, L. J.; Herrera, G.; Nigoche-Netro, A.
%F AA(Based on observations obtained at the Observatorio Astronómico Nacional at San Pedro Mártir, Baja California, Mexico.)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 3-21 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 21
%T CCD Photometry of M15
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_aruelas.pdf
%K Galaxy: halo, globular clusters: general, globular clusters: individual (NGC 7078), techniques: photometric
%B We present CCD observations of the galactic globular cluster M15, in the B and V filters. The cluster was reasonably covered, except in its northern region where our observations present a gap. We obtained a Hertzsprung-Russell (HR) diagram for each region observed, and later we produced a combined HR diagram containing more than 3000 stars. We generate a clean Colour Magnitude Diagram (CMD) and a Super Fiducial Line (SFL). Application of several methods and isochrone fitting leads us to obtain values for the metallicity [Fe/H]M15 $ \sim$ - 2.16±0.10, the reddening E(B - V)M15 $ \sim$ 0.11±0.03, and a distance modulus of [(m - M)0]M15 $ \sim$ 15.03.
%Z

Arellano Ferro, A., García-Lugo, G., & Rosenzweig, P. 2006, RevMexAA, 42, 75

Arellano Ferro, A., Giridhar, S., Rojas López, V., Figuera, R., Bramich, D. M., & Rosenzweig, P. 2008a, RevMexAA, 44, 365

Arellano Ferro, A., Rojas López, V., Giridhar, S., & Bramich, D. M. 2008b, MNRAS, 384, 1444

Armandroff, T. E., & Zinn, R. 1988, AJ, 96, 92

Auriere, M., Adams, S., & Seaton, M. J. 1983, MNRAS, 205, 571

Bell, R. A., & Gustafsson, B. 1983, MNRAS, 204, 249

Bica, E. L. D., & Pastoriza, M. G. 1983, Ap&SS, 91, 99

Boesgaard, A. M., & Steigman, G. 1985, ARA&A, 23, 319

Brodie, J. P., & Hanes, D. A. 1986, ApJ, 300, 258

Brown, A. 1950, AJ, 55, 165

ibidrule 1951, ApJ, 113, 344

Buonanno, R., Buscema, G., Corsi, C. E., Iannicola, G., & Fusi Pecci, F. 1983, A&AS, 51, 83

Buonanno, R., Corsi, C. E., & Fusi Pecci, F. 1981, MNRAS, 196, 435

ibidrule 1985, A&A, 145, 97

Burles, S., Nollett, K. M., & Turner, M. S. 2001, ApJ, 552, L1

Burstein, D., & McDonald, L. H. 1975, AJ, 80, 17

Butler, D. 1975, ApJ, 200, 68

Buzzoni, A., Pecci, F F., Buonanno, R., & Corsi, C. E. 1983, A&A, 128, 94

Cacciari, C., Caloi, V., Castellani, V., & Fusi Pecci, F. 1984, A&A, 139, 285

Cacciari, C., & Clementini, G. 2003, in Stellar Candles for Extragalactric Distance Scale, ed. D. Alloin & W. Gieren (Berlin: Springer), 105

Carretta, E., & Gratton, R. G. 1997, A&AS, 121, 95

Chaboyer, B. 1999, in Post-Hipparcos Cosmic Candles, ed. A. Heck & F. Caputo (Dordrecht: Kluwer), 111

Christy, R. F. 1966, ApJ, 144, 108

Cohen, J. G. 1979, ApJ, 231, 751

Demarque, P., & McClure, R. D. 1977, in Evolution of Galaxies and Stellar Populations, ed. B. M. Tinsley & R. B. Larson (New Haven: Yale Univ. Obs.), 199

Dotter, A., Chaboyer, B., Jevremovic, D., Baron, E., Ferguson, J. W., Sarajedini, A., & Anderson, J. 2007, AJ, 134, 376

Durrell, P. R., & Harris, W. E. 1993, AJ, 105, 1420

Fahlman, G. G., Richer, H. B., & Vandenberg, D. A. 1985, ApJS, 58, 225

Fernley, J. 1993, A&A, 268, 591

Freeman, K. C., & Norris, J. 1981, ARA&A, 19, 319

Frogel, J. A., Cohen, J. G., & Persson, S. E. 1983, ApJ, 275, 773

Geisler, D., Minniti, D., & Claria, J. 1992, AJ, 104, 627

Harris, W. E. 1996, AJ, 112, 1487

Harris, W. E., & Canterna, R. 1979, ApJ, 231, L19

Harris, W. E., & Racine, R. 1979, ARA&A, 17, 241

Hesser, J. E., Hartwick, F. D. A., & McClure, R. D. 1977, ApJS, 33, 471

Iben, I., & Rood, R. T. 1969, Nature, 223, 933

Izotov, Y. I., & Thuan, T. X. 2004, ApJ, 602, 200

Izotov, Y. I., Thuan, T. X., & Stasinska, G. 2007, ApJ, 662, 15

Kaltcheva, N. T. 1993, Ap&SS, 206, 103

Kraft, R. P. 1979, ARA&A, 17, 309

Kron, G. E., & Guetter, H. H. 1976, AJ, 81, 817

Lee, Y.-W., Demarque, P., & Zinn, R. 1994, ApJ, 423, 248

Luridiana, V., Peimbert, A., Peimbert, M., & Cerviño, M. 2003, ApJ, 592, 846

Maraldi, J. D. 1751, Mém. Acad. Roy. des Sciences pour, 1746, 58

McNamara, B. J., Harrison, T. E., & Baumgardt, H. 2004, ApJ, 602, 264

McNamara, D. H. 1997, PASP, 109, 857

Milone, A. P., et al. 2008, ApJ, 673, 241

Nelles, B., & Seggewiss, W. 1984, A&A, 139, 79

Nesci, R. 1983, A&A, 121, 226

Ödman, C. J., Melchiorri, A., Hobson, M. P., & Lasenby, A. N. 2003, Phys. Rev. D, 67, 083511

Peimbert, M., Luridiana, V., & Peimbert, A. 2007, ApJ, 666, 636

Pilachowski, C. A. 1984, ApJ, 281, 614

Pilachowski, C. A., Sneden, C., & Wallerstein, G. 1983, ApJS, 52, 241

Pryke, C., Halverson, N. W., Leitch, E. M., Kovac, J., Carlstrom, J. E., Holzapfel, W. L., & Dragovan, M. 2002, ApJ, 568, 46

Ruelas-Mayorga, A., & Sánchez, L. J. 2005, RevMexAA, 41, 507

Saio, H. 1977, Ap&SS, 50, 93

Salaris, M., Riello, M., Cassisi, S., & Piotto, G. 2004, A&A, 420, 911

Sandage, A. 1970, ApJ, 162, 841

Sandage, A. R., Katem, B., & Kristian, J. 1968, ApJ, 135, L129

Sandage, A., & Tammann, G. A. 2006, ARA&A, 44, 93

Sandquist, E. L., & Hess, J. M. 2008, AJ, 136, 2259

Sarajedini, A. 1994, AJ, 107, 618

Sarajedini, A., & Layden, A. 1997, AJ, 113, 264

Searle, L., & Zinn, R. 1978, ApJ, 225, 357

Sievers, J. L., et al. 2003, ApJ, 591, 599

Skillen, I., Fernley, J. A., Stobie, R. S., & Jameson, R. F. 1993, MNRAS, 265, 301

Smith, H. A. 1983, AJ, 88, 1762

Smith, H. A., & Perkins, G. J. 1982, ApJ, 261, 576

Sneden, C., Kraft, R. P., Prosser, C. F., & Langer, G. E. 1991, AJ, 102, 2001

Sneden, C., Kraft, R. P., Shetrone, M. D., Smith, G. H., Langer, G. E., & Prosser, C. F. 1997, AJ, 114, 1964

Spergel, D. N., et al. 2003, ApJS, 148, 175

Trefzger, D. V., Langer, G. E., Carbon, D. F., Suntzeff, N. B., & Kraft, R. P. 1983, ApJ, 266, 144

van Albada, T. S., de Boer, K. S., & Dickens, R. J. 1981, MNRAS, 195, 591

VandenBerg, D. A., Bolte, M., & Stetson, P. B. 1996, ARA&A, 34, 461

Yang, J., Turner, M. S., Schramm, D. N., Steigman, G., & Olive, K. A. 1984, ApJ, 281, 493

Zinn, R. 1980, ApJS, 42, 19

Zinn, R. J., & West, M. J. 1984, ApJS, 55, 45

%R 2010RMxAA..46...23B
%A Berman, M. S.
%F AA(Instituto Albert Einstein, Curitiba, PR, Brazil)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 23-28 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 28
%T Simple Model with Time-varying Fine structure ``Constant''-Part II
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_msberman.pdf
%K cosmological parameters, cosmology: theory, cosmology: miscellaneous, early universe, gravitation
%B The extension of Dirac's LNH to cover cosmological and fine-structure time-varying ``constants'', and the rotation of the universe, is here analysed, including a ``derivation'' of the angular speed of the present universe, and of the inflationary phase. Controversial points in the present calculation are clarified.
%Z


%R 2010RMxAA..46...29R
%A Rodríguez, L. F.; Gómez, Y.; López, J. A.; García-Díaz, M. T.; Clark, D. M.
%F AA(Centro de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México, Morelia, Michoacan, Mexico.)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 29-35 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 35
%T H91$ \alpha$ Radio Recombination Line and 3.5 cm Continuum Observations of the Planetary Nebula NGC242
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_lfrodriguez.pdf
%K planetary nebulae: individual (NGC 3242), radiation mechanisms: thermal
%B We present high sensitivity H91$ \alpha$ and 3.5 cm radio continuum observations toward the planetary nebula NGC 3242. The electron temperature determined assuming local thermodynamic equilibrium is consistent within $ \sim$10% with that derived from optical lines and the Balmer discontinuity. The line emission and the continuum emission have a very similar spatial distribution, suggesting that at this wavelength there is no other continuum process present in a significant manner. In particular, we conclude that emission from spinning dust is not important at this wavelength. In this radio recombination line the nebula presents a radial velocity structure consistent with that obtained from observations of optical lines.
%Z

Acker, A., Marcout, J., Ochsenbein, F., Stenholm, B., & Tylenda, R. 1992, The Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Garching: ESO)

Balser, D. S., Rood, R. T., & Bania, T. M. 1999, ApJ, 522, L73

Balick, B., Rugers, M., Terzian, Y. & Chungalur, J. N. 1993, \apj, 411, 778

Casassus, S. 2005, in ASP Conf. Ser. 344, The Cool Universe: Observing Cosmic Dawn, ed. C. Lidman & D. Alloin (San Francisco: ASP), 140

Casassus, S., Nyman, L.-Å., Dickinson, C., & Pearson, T. J. 2007, \mnras, 382, 1607

Casassus, S., Readhead, A. C. S., Pearson, T. J., Nyman, L.-Å., Shepherd, M. C., & Bronfman, L. 2004, ApJ, 603, 599

Condon, J. J., & Kaplan, D. L. 1998, ApJS, 117, 361

Draine, B. T., & Lazarian, A. 1998, ApJ, 508, 157

Dupree, A. K., & Goldberg, L. 1970, ARA&A, 8, 231

Finkbeiner, D. P., Schlegel, D. J., Frank, C., & Heiles, C. 2002, ApJ, 566, 898

Galli, D., Stanghellini, L., Tosi, M., & Palla, F. 1997, ApJ, 477, 218

Griffith, M. R., Wright, A. E., Burke, B. F., & Ekers, R. D. 1994, \apjs, 90, 179

Hajian, A. R., Terzian, Y., & Bignell, C. 1995, AJ, 109, 2600

Heap, S. R. 1986, in New Insights in Astrophysics: Eight Years of UV Astronomy with IUE, ed. E. Rolfe (ESA SP-263; Noordwijk: ESA), 291

Heckathorn, J. 1971, Ap&SS, 11, 309

Kaftan-Kassim, M. A. 1966, ApJ, 145, 658

Kaler, J. B. 1986, ApJ, 308, 322

Krabbe, A. C., & Copetti, M. V. F. 2005, A&A, 443, 981

Liu, X.-W., & Danziger, J. 1993, MNRAS, 263, 256

López, J. A., Richer, M. G., Riesgo, H., Steffen, W., García-Segura, G., Meaburn, J., & Bryce, M. 2006, in IAU Symp. 234, Planetary Nebulae in our Galaxy and Beyond, ed. M. J. Barlow & R. H. Méndez (Cambridge: Cambridge Univ. Press), 21

Meaburn, J., López, J. A., Gutiérrez, L., Quiróz, F., Murillo, J. M., & Valdéz, J. 2003, RevMexAA, 39, 185

Meaburn, J., López, J. A., & Noriega-Crespo, A. 2000, ApJS, 128, 321

Pazderska, B. M., et al. 2009, \aap, 498, 463

Pottasch, S. R. 1984, Planetary Nebulae (Dordrecht: Reidel)

Pottasch, S. R., & Bernard-Salas, J. 2008, \aap, 490, 715

Stanghellini, L., & Pasquali, A. 1995, ApJ, 452, 286

Umana, G., et al. 2008, \aap, 482, 529

%R 2010RMxAA..46...37S
%A Salas, L.; Cruz-González, I.
%F AA(Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 37-45 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 45
%T IMF from infrared photometry of young stellar
clusters in Taurus-Auriga and Orion
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_lsalas.pdf
%K stars: formation, stars: fundamental parameters, stars: low-mass, brown dwarfs, stars: pre-main sequence
%B We applied the extinction-disk-principal vectors approach to near infrared photometric data of the Taurus-Auriga region and Orion Nebula young stellar clusters. By assuming that the cluster age is represented by the median value of the age distribution we are able to derive the distribution of stellar masses. We showed that the resulting initial mass function (IMF) for these two young stellar clusters compares remarkably well and might be a robust representation of the IMF obtained by spectroscopic or photometric methods. The method also yields the extinction and disk contribution for each star. The overall extinction distribution for the Orion cluster is analyzed and compares well with previous work. The frequency of T Tauri stars with disks is about 50%.
%Z

Baraffe, I., Chabrier, G., Allard, F., & Hauschildt, P. H. 1998, A&A, 337, 403 1.016

Briceño, C., Luhman, K. L., Hartmann, L., Stauffer, J. R., & Kirkpatrick, J. D. 2002, ApJ, 580, 317

Cieza, L., & Baliber, N. 2007, ApJ, 671, 605

Cohen, M., & Kuhi, L. V. 1979, ApJS, 41, 743

D'Alessio, P., Merín, B., Calvet, N., Hartmann, L., & Montesinos, B. 2005, RevMexAA, 41, 61

D'Antona, F., & Mazzitelli, I. 1994, ApJS, 90, 467

ibidrule1997, Mem. Soc. Astron. Italiana, 68, 807

Guieu, S., Dougados, C., Monin, J.-L., Magnier, E., & Martín, E. L. 2006, A&A, 446, 485

Herbig, G. H., & Bell, K. R. 1988, Third Catalog of Emission Line Stars of the Orion Population (Santa Cruz: Lick Obs.)

ibidrule1995, VizieR Online Data Catalog, 5073, 0

Hillenbrand, L. A. 1997, AJ, 113, 1733

Hillenbrand, L. A., & Carpenter, J. M. 2000, ApJ, 540, 236

Hillenbrand, L. A., Strom, S. E., Vrba, F. J., & Keene, J. 1992, ApJ, 397, 613

Hillenbrand, L. A., & White, R. J. 2004, ApJ, 604, 741

Kenyon, S. J., & Hartmann, L. 1995, ApJS, 101, 117 (KH95)

Lada, C. J., & Adams, F. C. 1992, ApJS, 393, 278

Lada, C. J., Muench, A. A., Rathborne, J., Alves, J. D., & Lombardi, M. 2008, ApJ, 672, 410

López-Chico, T., & Salas, L. 2007, RevMexAA, 43, 15 (LS07)

Luhman, K. L. 2004, ApJ, 617, 1216

Luhman, K. L., Lada, E. A., Muench, A. A., & Elston, R. J. 2005, ApJ, 618, 810

Luhman, K. L., Whitney, B. A., Meade, M. R., Babler, B. L., Indebetouw, R., Bracker, S., & Churchwell, E. B. 2006, ApJ, 647, 1180

Luhman, K. L., et al. 2000, ApJ, 540, 1016

Meyer, M. R., Calvet, N., & Hillenbrand, L. A. 1997, AJ, 114, 288

Miller, G. E., & Scalo, J. M. 1979, ApJS, 41, 513

Muench, A. A., Lada, E. A., & Lada, C. J. 2000, ApJ, 533, 358

Muench, A. A., Lada, E. A., Lada, C. J., & Alves, J. 2002, ApJ, 573, 366

Palla, F., & Stahler, S. W. 1999, ApJ, 525, 772

Rebull, L. M., Stauffer, J. R., Megeath, S. T., Hora, J. L., & Hartmann, L. 2006, ApJ, 646, 297

Rieke, G. H., & Lebofsky, M. J. 1985, ApJ, 288, 618

Scelsi, L., et al. 2007, A&A, 468, 405

%R 2010RMxAA..46...47H
%A Hernández-Toledo, H. M.; Martínez-Vázquez, L. A.; Moreno-Corral, M. A.; Pani-Cielo, A.
%F AA(Based on data obtained at the 1 m telescope of the Observatorio Astronómico Nacional, Tonantzintla, Puebla, México, operated by the Instituto de Astronomía, Universidad Nacional Autónoma de México.)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 47-60 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 60
%T A Photometric and Spectroscopic Evaluation of
the Site at Tonantzintla Observatory
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_hhernandez.pdf
%K atmospheric effects, site testing, stars: fundamental parameters, stars: imaging, techniques: photometric, techniques: spectroscopic
%B Based on data obtained at the Observatorio Astronómico Nacional, Tonantzintla, an evaluation of the quality of the local sky is presented. The evaluation is carried out through an absolute CCD calibration to a set of standard stars in the field of M67 in the B, V, R and I Johnson-Cousins system and from Boller & Chivens long-slit spectroscopic observations of the local sky at various elevations. The sky brightness is estimated from our CCD frames yielding a mean value of 18.5±0.6-2. The mean atmospheric extinction curve behaves midway between the normal extinction and that related to volcanic outbursts. From the long-slit spectra of the sky at OAN-Tonantzintla, HgI and NaI lines of high and low pressure lamps are identified. These results allow us to justify a major upgrading of the observatory, to convert the OAN-Tonantzintla into the Laboratory for Astronomy Education both for UNAM and for other educational institutions in the center-south part of the country.
%Z 0.95

Bok, B. J. 1941, Sky & Telescope, 2, 3

Chevalier, C., & Ilovaisky, S. A. 1991, A&AS, 90, 225

De Robertis, M., Fingerhut, R., & Blake, M. 2002, http://www.astro.utoronto.ca/DDO/prospective/torontosky.html

Garstang, R. H., 1986, PASP, 98, 364

ibidrule1989, PASP, 101, 306

Gutiérrez, L., et al. 1996, RevMexAA, 32, 63

Haro, G. 1958, Observatorio Astronómico Nacional (México: Universidad Nacional Autónoma de México)

Hernández-Toledo, H. M., & Puerari, I. 2001, A&A, 379, 54

Holmes, R. W. 1997, Observatory, 117, 25

Hiltner, W, A. 1960, Astronomical Techniques, Vol. II (Chicago: Chicago Univ. Press)

Landolt, A. U. 1992, AJ, 104, 340

Lane, M. C., & Garrison, R. F. 1978, JRASC, 72, 198

Massey, P., & Davies, L. E. 1992, A User's Guide to Stellar CCD Photometry with IRAF (Tucson: NOAO)

Massey, P., & Foltz, C. B. 2000, PASP, 112, 566

Massey, P., Gronwall, C., & Pilachowski, C. A. 1990, PASP, 102, 1046

McNally, D. 1994, in The Vanishing Universe, ed. D. McNally (Cambridge: Cambridge Univ. Press), 49

Mayall, N. U. 1942, PASP, 54, 319, 117

Mitchell, R., & Johnson, H. L. 1970, Commun. Lunar Planet. Lab., 8, 1

Moreno-Corral, M. A., & López-Molina, M. G. 1992, Domingo Taboada Roldán, estudioso del espacio y del tiempo (México: Fundación Protectora de Puebla ``Aurora Marín de Taboada'')

Osterbrock, D. E. 2003, J. Astron. Hist. Heritage, 6, 120

Osterbrock, D. E., & Martel, A. 1992, PASP, 104, 76

Osterbrock, D. E., Walker, M. F., & Koski, A. T. 1976, PASP, 88, 349

Pilachowski, C. A., Africano, J. L., Goodrich, B. D., & Binkert, W. S. 1989, PASP, 101, 707

Pismis, P., & Moreno, M. A. 1984, Bull. Am. Astron. Soc., 16, 720

Poveda, A., & Allen, C. 1987, in La Investigación Científica en la UNAM 1929-1979 (t. I, v. 5, México: Universidad Nacional Autónoma de México), 113

Schaefer, E. 1990, PASP, 102, 212

Schuster, W. J., & Parrao, L. 2001, RevMexAA, 37, 187

Sheen, Y. K., & Byun, Y. I. 2004, J. Korean Astron. Soc., 37, 87

Torres-Peimbert, S., & Robledo-Rella, V. 1990, Reporte Técnico, 72 (IA-UNAM)

Trueblood, B. 1988, Fundación Mary Street Jenkins (México: Fundación Mary Street Jenkins)

Villata, M., et al. 2006, A&A, 453, 817

Voitsekhovich, V. V., Sánchez, L. J., Orlov, V. G., Garfias, F., & Benítez, R. 2005, RevMexAA, 41, 399

Walker, M. F. 1977, PASP, 89, 405

ibidrule1991, in ASP Conf. Ser. 17, Light Pollution, Radio Interference and Space Debris', ed. D. L. Crawford (San Francisco: ASP), 52

%R 2010RMxAA..46...61T
%A Tovmassian, H.
%F AA(Instituto Nacional de Astrofísica, Óptica y Electrónica, Mexico)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 61-66 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 66
%T On the Precursors of Fossil Groups
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_htovmassian.pdf
%K galaxies: clusters: general, galaxies: elliptical and lenticular, cD
%B We compare the absolute magnitudes in the K-band of the brightest galaxies in clusters of Bautz-Morgan type I with those of the fossil group brightest galaxies. It is found that the brightest galaxies in fossil groups are on average fainter than the brightest galaxies in clusters. It is also shown that the brightness of the brightest galaxy depends on the cluster richness. It is concluded that the precursors of fossil groups were on average poor clusters.
%Z

Abell, G. O., Corwin, Jr., H. G. & Olowin, R. P. 1989, ApJS, 70, 1 (ACO)

Andernach, H., Tago, E., Einasto, M., Einasto, J. & Jaaniste, J. 2005, in ASP Conf. Ser. 329, Nearby Large-Scale Structures and the Zone of Avoidance, ed. A. P. Fairall & P. Woudt (San Francisco: ASP), 283

Barnes, J. E. 1989, Nature, 338, 123

Bautz, L., & Morgan, W. W. 1970, ApJ, 162, L149

Bell, E. F., McIntosh, D. H., Katz, N., & Weinberg, M. D. 2003, ApJS, 149, 289

Bernardi, M., Hyde, J. B., Sheth, R. K., Miller, C. J., & Nichol, R. C. 2007, AJ, 133, 1741

Boylan-Kolchin, M., Ma, C., & Quataert, E. 2006, MNRAS, 369, 1081

Courteau, S., Dutton, A. A., van den Bosch, F. C., MacArthur, L. A., Dekel, A., McIntosh, D. H., & Dale, D. A. 2007, ApJ, 671, 203

Cypriano, E. S., Mendes de Oliveira, C., & Sodré, L., Jr. 2006, AJ, 132, 514

Dariush, A., Khosroshahi, H. G., Ponman, T. J., Pearce, F., Raychaudhury, S., & Hartley, W. 2007, MNRAS, 382, 433

Díaz-Giménez, E., Muriel, H., & Mendes de Oliveira, C. 2009, arXiv:0809.2290

D'Ongia, E., Sommer-Larsen, J., Romeo, A. D., Burkert, A., Pedersen, K., Portinari, L., & Rasmussen, J. 2005, ApJ, 630, L109

Jarrett, T. H., Chester, T., Cutri, R., Schneider, S., Skrutskie, M., & Huchra, J. P. 2000, AJ, 119, 2498

Jones, L. R., Ponman T. J., & Forbes, D. A. 2000, MNRAS, 312, 139

Jones, L. R., Ponman, T. J., Horton, A., Babul, A., Ebeling, H., & Burke, D. J. 2003, MNRAS, 343, 627

Khosroshahi, H. G., Ponman, T. J., & Jones, L. R. 2007, MNRAS, 377, 595

Kochanek, C. S., et al. 2001, ApJ, 560, 566

Lauer, T. R., et al. 2007, 662, 808

Lin, Y.-T., & Mohr, J. J. 2004, ApJ, 617, 879

Masters, K. L., Springob, C. M., & Huchra, J. P. 2008, AJ, 135, 1738

Mendes de Oliveira, C. 2006, RevMexAA (SC), 26, 105

Mendes de Oliveira, C., & Carrasco, E. R. 2007, ApJ, 670, L93

Mendes de Oliveira, C., Cypriano, E. S., Dupke, R. A., & Sodré, L., Jr. 2009, AJ, 138, 502

Mendes de Oliveira, C., Cypriano, E. S., & Sodré, L., Jr. 2006, AJ, 131, 158

Mulchaey, J. S., & Zabludoff, A. I. 1999, ApJ, 514, 133

Ponman, T. J., Allan, D. J., Jones, L. R., Merrifield, M., McHardy, I. M., Lehto, H. J., & Luppino, G. A. 1994, Nature, 369, 462

Santos, W. A., Mendes de Oliveira, C., & Sodré, L., Jr. 2007, AJ, 134, 1551

Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, ApJ, 500, 525

Schombert, J. M. 1988, ApJ, 328, 475

Struble, M. F., & Rood, H. J. 1987, ApJS, 63, 555

Temi, P., Brighenti, F., & Mathews, W. G. 2008, ApJ, 672, 244

Tovmassian, H. M., Plionis, M., & Andernach, H. 2004, ApJ, 617, L111

Vikhlinin, A., McNamara, B. R., Hornstrup, A., Quintana, H., Forman, W., Jones, C., & Way, M. 1999, ApJ, 520, L1

Von Benda-Beckmann, A., D'Onghia, E., Gottlober, S., Hoeft, M., Khalatyan, A., Klypin, A., & Muller, V. 2008, MNRAS, 386, 2345

Zibetti, S., Pierini, D., & Pratt, G. W. 2009, MNRAS, 392, 525

%R 2010RMxAA..46...67K
%A Kajdic, P.; Raga, A. C.; Reipurth, B.; Walawender, J.
%F AA(Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico.)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 67-78 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 78
%T Herbig-Haro objects around CG0
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_pkajdic.pdf
%K ISM: globules, ISM: jets and outflows, ISM: Herbig-Haro objects, stars: formation
%B In this work we study Herbig-Haro objects located in the region around the head of the cometary globule CG0. Two sets of optical images are presented. The first set was obtained with the 3.5New Technology Telescope in 1995 in three emission lines: H$ \alpha$, [S 0] $ \lambda$$ \lambda$6731,6716
r A - [O 0]$ \lambda$3729
r AThe second set is an H$ \alpha$ image of the CG0/31/38 complex obtained in 2006 with the 8Subaru telescope. A proper motion study of the HH objects in the region was performed using the H$ \alpha$ images from both epochs. Due to the high resolution of our images we were able, for the first time, to resolve the HH20 object into ten knots and measure proper motions for some of them. We discovered several new HH objects which are best seen in our [S 0] image as well as a large bipolar jet, HH50, emerging from the head of CG0. We suggest that two previously known submillimeter sources are the driving sources for the HH20 and HH50 flows. They could both be binary sources, because (1) the proper motion vectors of the HH20 knots suggest that this object is actually composed of two outflows and (2) the structure of the HH50 flow suggests that the direction of the jet axis has changed in the past.
%Z

Bhatt, H. C. 1999, MNRAS, 308, 40

Chen, X. P., Bourke, T. L., Launhardt, R., & Henning, T. 2008a, ApJ, 686, L107

Chen, X. P., Launhardt, R., Bourke, L. T., Henning, T., & Barnes, P. J. 2008b, ApJ, 683, 862

Devine, D., Reipurth, B., Bally, J., & Balonek, T. J. 1999, AJ, 117, 2931

Graham, J. R., & Heyer, M. H. 1989, PASP, 101, 573

Gum, C. S. 1952, Observatory, 72, 151

Hawarden, T. G., & Brand, P. W. J. L. 1976, MNRAS, 175, 19

Hodapp, K. W., & Ladd, E. F. 1995, ApJ, 453, 715

Kim, J. S., Walter, F. M., & Wolk, S. J. 2005, AJ, 129, 1564

Knude, J., Jønch-Sørensen, H., & Nielsen, A. S. 1999, A&A, 350, 985

Knude, J., & Nielsen, A. S. 2000, A&A, 362, 1138

Launhardt, R., Sargent, A. I., Henning, Th., Zylka, R., & Zinnecker, H. 2000, in IAU Symp. 200, Birth and Evolution of Binary Stars, ed. B. Reipurth & H. Zinnecker (Potsdam: AIP), 103 1.018

Nielsen, A. C., Olberg, M., Knude, J., & Booth, R. S. 1998, A&A, 336, 329

Nielsen, A. S., Jønch-Sørensen, H., & Knude, J. 2000, A&A, 358, 1077

Nisini, B., Garatti, C. A., Giannini, T., & Lorenzetti, D. 2002, A&A, 393, 1035

Persi, P., Ferrari-Toniolo, M., Marenzi, A. R., Anglada, G., Chini, R., Krügel, E., & Sepúlveda, I. 1994, A&A, 282, 233

Pettersson, B. 1984, A&A, 139, 135

Reipurth, B. 1981, A&AS, 44, 379

ibidrule1983, A&A, 117, 183

Scarrott, S. M., Gledhill, T. M., Rolph, C. D., & Wolstencroft, R. D. 1990, MNRAS, 242, 419

Schwartz, R. D. 1977, ApJ, 212, L25

Schwartz, R. D., & Greene, T. P. 2003, AJ, 126, 339

Westerlund, B. E. 1963, MNRAS, 127, 71

Wu, J., Dunham, M. M., Evans, N. J. II, Bourke, T. L., & Young, C. H. 2007, AJ, 133, 1560

Zealey, W. J., Ninkov, Z., Rice, E., Hartley, M., & Tritton, S. B. 1983, Astrophys. Lett., 23, 119

Zinnecker, H., et al. 1999, A&A, 352, L73

%R 2010RMxAA..46...79A
%A Amorim, R. F.; Cerqueira, A. H.; Raga, A. C.; Vasconcelos, M. J.
%F AA(LATO-DCET, Universidade Estadual de Santa Cruz, Ilhéus, Bahia, Brazil.)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 79-87 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 87
%T Photoevaporation of a binary proplyd system
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_mjvasconcelos.pdf
%K Hregions, stars: circumstellar matter, stars: mass loss, stars: pre-main sequence
%B We present 3D numerical simulations of photo-evaporation of a binary accretion disk system inside an Hregion. The simulations take into account far- and extreme-ultraviolet (FUV and EUV) radiation from a stellar source. We study both FUV dominated and EUV dominated models. FUV dominated models show a well defined interproplyd shell in both H$ \alpha$ emission and density maps, when the separation of the binary system is relatively large ( $ \sim$ 2000 AU). For smaller separations ( $ \simeq$ 200 AU), the interproplyd shell no longer develops. We show that an EUV model with a suitable choice of parameters increases the H$ \alpha$ emission of the interproplyd shell relative to the emission of the ionization fronts, in better agreement with the observations of the binary proplyd LV1.
%Z

Bally, J., Sutherland, R. S., Devine, D., & Johnstone, D. 1998, \aj, 116, 293

Cerqueira, A. H., Cantó, J., Raga, A. C., & Vasconcelos, M. J. 2006a, RevMexAA, 42, 203

Cerqueira, A. H., Velázquez, P. F., Raga, A. C., Vasconcelos, M. J., & De Colle, F. 2006b, \aap, 448, 231

Frank, J., King, A., & Raine, D. 1992, Accretion Power in Astrophysics (3rd ed.; Cambridge: Cambridge Univ. Press), 89

García-Arredondo, F., Henney, W. J., & Arthur, S. J. 2001, \apj, 561, 830

Graham, M. F., Meaburn, J., Garrington, S. T., O'Brien, T. J., Henney, W. J., & O'Dell, C. R. 2002, \apj, 570, 222

Hartmann, L. 1998, Accretion Process in Star Formation (1st ed.; Cambridge: Cambridge Univ. Press), 91

Henney, W. J. 2002, RevMexAA, 38, 71

Hillenbrand, L. A. 1997, \aj, 113, 1733

Johnstone, D., Hollenbach, D., & Bally, J. 1998, \apj, 499, 758

Lefloch, B., & Lazareff, B. 1994, \aap, 289, 559

Levermore, C., & Pamraning, G. 1981, \apj, 248, 231

Lim, A. J., & Mellema, G. 2003, A&A, 405, 189

Mellema, G., Raga, A. C., Cantó, J., Lundqvist, P., Balick, B., Steffen, W., & Noriega-Crespo, A. 1998, \aap, 331, 335

O'Dell, C. R., & Wen, Z. 1994, \apj, 436, 194

O'Dell, C. R., & Wong, K. 1996, \aj, 111, 846

Papaloizou, J. C. B., & Terquem, C. 1999, \apj, 521, 823

Petr, M., Coude Du Foresto, V., Beckwith, S., Richichi, A., & McCaughrean, M. 1998, \apj, 500, 825

Pringle, J. E. 1981, \araa, 19, 137

Raga, A. C., Navarro-González, R., & Villagrán-Muñiz, M. 2000, RevMexAA, 36, 67

Raga, A. C., Noriega-Crespo, A., Cantó, J., Steffen, W., van Buren, D., Mellema, G., & Lundqvist, P. 1997, RevMexAA, 33, 73

Richling, S., & Yorke, H. W. 2000, ApJ, 539, 258

Smith, N., Bally, J., Licht, D., & Walawender, J. 2005, AJ, 129, 382

Störzer, H., & Hollenbach, D. 1999, \apj, 515, 669

Tielens, A.G.G.M., & Hollenbach, D. 1985, \apj, 291, 772

van Leer, B. 1982, ICASE Report No. 82-30

%R 2010RMxAA..46...89B
%A Bohigas, J.; Núñez, J. M.
%F AA()
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 89-107 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 107
%T The green potential of the San Pedro Mártir observatory
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_jbohigas.pdf
%K seeing, site testing
%B Weather observations carried out between October 2004 and July 2008 at the Mexican Observatorio Astronómico Nacional (OAN) are analyzed. Humidity in April, May and June was less than 55% nearly 90% of the time. Wind speed was larger at nightime and tended to decrease between March and November. Typical temperature variations during the night, for the entire day and for a whole year were about 2, 6 and 16oC, respectively. The scale height or roughness length for the function relating wind speed and height above ground is between 0.55 and 0.67 meters. Normal activities associated to OAN produced somewhat more than 750 tons of CO2eq a year, roughly 3 times more than a typical mid-scale industry in the district of Ensenada, where OAN is located. Wind energy could have been extracted to produce electricity $ \sim$ 60
endtex2htmldeferred%
of the time, being more bountiful during the night and in the winter and early spring months. Solar and wind energy seem plentiful enough to supply the entire energy needs of the observatory, some 110 kWh including transportation.
%Z

Álvarez, M., Michel, R., Reyes-Coca, S., & Troncoso-Gaytán, R. 2007, RevMexAA (SC), 31, 111

Bohigas, J., et al. 2008, RevMexAA, 44, 231

Bolton, D. 1980, Monthly Weather Review 108, 1046

Erasmus, D. A., & van Staden, C. A. 2002, A Satellite Survey of Cloud Cover and Water Vapor in the Southwestern USA and Northern Mexico. A Study Conducted by CELT Project (Pasadena: Caltech)

Schöck, M., et al. 2009, PASP, 121, 384

Tapia, M., Hiriart, D., Richer, M., & Cruz-González, I. 2007, RevMexAA (SC), 31, 47

Wallace, J. M., & Hobbs, P. V. 2006, Atmospheric Science: An Introductory Survey (2nd ed.; San Diego, CA: Academic Press)

%R 2010RMxAA..46..109K
%A Küçük, I.; Akkaya, I.
%F AA(Department of Astronomy and Space Sciences, Erciyes University, Turkey)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 109-114 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 114
%T Age Estimation And Mass Functions of TTauri Stars
in The Taurus Auriga Molecular Cloud
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_ikucuk.pdf
%K open clusters and associations: general, stars: evolution, stars: fundamental parameters, stars: pre-main sequence
%B In this work the present day mass functions (PDMF) of T-Tauri Stars (TTS) which are in the pre-main sequence (PMS) evolutionary phase of their evolution in the Taurus-Auriga Molecular Cloud Complex have been calculated. For this purpose, by applying our modified stellar evolutionary code, stellar models in the mass range 0.1 - 2.5
endtex2htmldeferredM$\scriptstyle \odot$
are used to determine the mass and age mass of TTS. The obtained mass function is compared with the mass function of Miller & Scalo (1979). The age found for TTS is around 1 - 3×106 yr and the mass function is about 0.644$ \mp$0.348. From these results, we have calculated the stellar birthrate as about 1.3×10-7
endtex2htmldeferredM$\scriptstyle \odot$
-1 in this region.
%Z

Akkaya, I., & Küçük, I. 2005, Astron. Astrophys. Transactions, 6, 497

Davé, R. 2008, \mnras, 385, 147

Kenyon, S. J., & Hartmann, L. 1995, \apjs, 101, 117 (KH95)

Kroupa, P. 2002, Science, 295, 82

Kroupa, P., Tout, C. A., & Gilmore, G. 1990, \mnras, 244, 76

ibidrule1991, \mnras, 251, 293

Küçük, I., Kiziloglu, N., & Civelek, R. 1998, \apss, 3, 279

Larson, R. B. 1999, in Star Formation, ed. T. Nakamoto (Nobeyama: Nobeyama Radio Observatory), 336

Lequeux, J. 1979, \aap, 80, 35

Luhman, K. L. 2004, \apj, 617, 1216

Miller, G. E., & Scalo, J. M. 1979, \apjs, 41, 513

Salpeter, E. E. 1955, ApJ, 121, 161

Scalo, J. M. 1986, \fcp, 11, 1

Sagar, R., Piskunov, A. E., Miakutin, V. I., & Joshi, U. C. 1986, \mnras, 220, 383

Thies, I., & Kroupa, P. 2007, \apj, 671, 767

Walter, F. M., Brown, A., Mathieu, R. D., Myers, P. C., & Vrba, F. 1988, \aj, 96, 297

Yildiz, M., & Kiziloglu, N. 1997, \aap, 326, 187

%R 2010RMxAA..46..115Z
%A Zaninetti, L.
%F AA()
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 115-134 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 134
%T A geometrical model for the catalogs of galaxies
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_lzaninetti.pdf
%K galaxies: clusters: general, galaxies: general, galaxies: statistics
%B The 3D network originated by the faces of irregular Poissonian Voronoi polyhedra may represent the backbone on which the galaxies are originated. As a consequence the spatial appearance of the catalogs of galaxies can be reproduced. The selected catalogs to simulate are the 2dF Galaxy Redshift Survey and the Third Reference Catalog of Bright Galaxies. In order to explain the number of observed galaxies for a given flux/magnitude as a function of the redshift, the photometric properties of the galaxies should be carefully examined from both the astronomical and theoretical point of view. The statistics of the Voronoi normalized volume is modeled by two distributions and the Eridanus super-void is identified as the largest volume belonging to the Voronoi polyhedron. The behavior of the correlation function for galaxies is simulated by adopting the framework of thick faces of Voronoi polyhedra on short scales, while adopting standard arguments on large scales.
%Z 0.995

Aarseth, S. J. 1978, in IAU Symp. 79, The Large Scale Structure of the Universe, ed. M. S. Longair & J. Einasto (Dordrecht: Reidel), 189

Barrow, J. D., & Coles, P. 1990, MNRAS, 244, 188

Behr, A. 1951, Astron. Nachr., 279, 97

Berlind, A. A., et al. 2006, ApJS, 167, 1

Bernardeau, F., & van de Weygaert, R. 1996, MNRAS, 279, 693

Charlton, J. C., & Schramm, D. N. 1986, ApJ, 310, 26

Coles, P. 1991, Nature, 349, 288

Coles, P., & Lucchin, F. 2002, Cosmology: The Origin and Evolution of Cosmic Structure (2nd ed.; England: John Wiley & Son)

Colless, M., et al. 2001, MNRAS, 328, 1039

Cooray, A., & Sheth, R. 2002, Phys. Rep., 372, 1

Cruz, M., Martínez-González, E., Vielva P., & Cayón, L. 2005, MNRAS, 356, 29

de Vaucouleurs, G., de Vaucouleurs, A., Corwin, H. G., Jr., Buta, R. J., Paturel, G., & Fouque, P. 1991, Third Reference Catalogue of Bright Galaxies (New York: Springer-Verlag)

Ebeling, H., & Wiedenmann, G. 1993, Phys. Rep., 47, 704

Einasto, M., Einasto, J., Tago, E., Dalton, G. B., & Andernach, H. 1994, MNRAS, 269, 301

Eisenstein, et al. 2005, ApJ, 633, 560

Eke, V. R., et al. 2004, MNRAS, 355, 769

Elyiv, A., Melnyk, O., & Vavilova, I. 2009, MNRAS, 394, 1409

Evrard, A. E., et al. 2002, ApJ, 573, 7

Ferenc, J.-S., & Néda, Z. 2007, Physica A Statistical Mechanics and its Applications, 385, 518

Geller, M. J., & Huchra, J. P. 1989, Science, 246, 897

Goldwirth, D. S., da Costa, L. N., & van de Weygaert, R. 1995, MNRAS, 275, 1185

Gott, J. R. III, & Rees, M. J. 1975, A&A, 45, 365

Gott, J. R. III, Turner, E. L., & Aarseth, S. J. 1979, ApJ, 234, 13

Heinrich, L., & Muche, L. 2008, Math. Nachr., 281, 350

Hubble, E. 1929, Proc. Natl. Acad. Sci., 15, 168

Icke, V., & van de Weygaert, R. 1987, A&A, 184, 16

Ikeuchi, S., & Turner, E. L. 1991, MNRAS, 250, 519

Ivezic, Z., et al. 2002, AJ, 124, 2364

Jones, B. J., Martínez, V. J., Saar, E., & Trimble, V. 2005, Rev. Mod. Phys., 76, 1211

Kiang, T. 1966, Zert. Astrophys., 64, 433

Klypin, A., & Shandarin, S. F. 1993, ApJ, 413, 48

Lindner, U., Einasto, J., Einasto, M., Freudling, W., Fricke, K., & Tago, E. 1995, A&A, 301, 329

Madgwick, D. S., et al. 2002, MNRAS, 333, 133

Malmquist, K. 1920, Lund. Astr. Medd. Ser. II, 22, 1

ibidrule1922, Lund. Astr. Medd. Ser. I, 100, 1

Mandelbrot, B. 1975, C. R. Acad. Sci. Paris Serie Sci. Math., 280, 1551

Marinoni, C., Davis, M., Newman, J. A., & Coil, A. L. 2002, ApJ, 580, 122

Martínez, V. J., et al. 2009, ApJ, 696, L93 1

McEwen, J. D., Wiaux, Y., Hobson, M. P., Vandergheynst, P., & Lasenby, A. N. 2008, MNRAS, 384, 1289

Melnyk, O. V., Elyiv, A. A., & Vavilova, I. B. 2006, Kinematika i Fizika Nebesnykh Tel, 22, 283

Neyman, J., & Scott, E. L. 1952, ApJ, 116, 144

Neyrinck, M. C., Gnedin, N. Y., & Hamilton, A. J. S. 2005, MNRAS, 356, 1222

Okabe, A., Boots, B., & Sugihara, K. 1992, Spatial tessellations. Concepts and Applications of Voronoi diagrams (New York: Wiley)

Padmanabhan, P. 2002, Theoretical Astrophysics. Vol. III: Galaxies and Cosmology (Cambridge: Cambridge Univ. Press)

Padmanabhan, T. 1996, Cosmology and Astrophysics Through Problems (Cambridge: Cambridge Univ. Press)

Peebles, P. J. E. 1974a, Ap&SS, 31, 403

ibidrule1974b ApJ, 189, L51

ibidrule1980, The Large-Scale Structure of the Universe (Princeton: Princeton Univ. Press)

ibidrule1993, Principles of Physical Cosmology (Princeton: Princeton Univ. Press)

Pierre, M. 1990, A&A, 229, 7

Press, W. H., Teukolsky, S. A., Vetterling, W. T., & Flannery, B. P. 1992, Numerical Recipes in FORTRAN. The Art of Scientific Computing (Cambridge: Cambridge Univ. Press)

Rudnick, L., Brown, S., & Williams, L. R. 2007, ApJ, 671, 40

Sahni, V., & Coles, P. 1995, Phys. Rep., 262, 1

Sandage, A., Tammann, G. A., Saha, A., Reindl, B., Macchetto, F. D., & Panagia, N. 2006, ApJ, 653, 843

Schaap, W. E., & van de Weygaert, R. 2000, A&A, 363, L29

Schechter, P. 1976, ApJ, 203, 297

Scherrer, R. J., & Bertschinger, E. 1991, ApJ, 381, 349

Shandarin, S. F., & Zel'dovich, Y. B. 1989, Rev. Mod. Phys., 61, 185

Soneira, R. M., & Peebles, P. J. E. 1977, ApJ, 211, 1

ibidrule1978, AJ, 83, 845

Sparke, L. S., & Gallagher, J. S. III 2000, Galaxies in the Universe: An Introduction (Cambridge: Cambridge Univ. Press)

Subba-Rao, M. U., & Szalay, A. S. 1992, ApJ, 391, 483

Szalay, A. S., Broadhurst, T. J., Ellman, N., Koo, D. C., & Ellis, R. S. 1993, Proc. Natl. Acad. Sci., 90, 4853

Tempel, E., Einasto, J., Einasto, M., Saar, E., & Tago, E. 2009, A&A, 495, 37

Turner, E. L., Aarseth, S. J., Blanchard, N. T., Mathieu, R. D., & Gott, J. R. III 1979, ApJ, 228, 684

van de Weygaert, R. 1991a, MNRAS, 249, 159

ibidrule1991b, Ph.D. Thesis, University of Leiden

ibidrule2002, arXiv:astro-ph/0206427

ibidrule2003, in Statistical Challenges in Astronomy, ed. E. D. Feigelson & G. Jogesh Babu (Berlin: Springer-Verlag), 156

van de Weygaert, R., & Icke, V. 1989, A&A, 213, 1

van de Weygaert, R., & Schaap, W. 2009, Lect. Notes Phys., 665, 291

Vielva, P., Martínez González, E., Barreiro, R. B., Sanz, J. L., & Cayón, L. 2004, ApJ, 609, 22

von Benda-Beckmann, A. M., & Müller, V. 2008, MNRAS, 384, 1189

Zaninetti, L. 1995, A&AS, 109, 71

ibidrule2006, Chinese J. Astron. Astrophys., 6, 387

ibidrule2008, AJ, 135, 1264

Zaninetti, L., & Ferraro, M. 1990, A&A, 239, 1

Zehavi, I., et al. 2004, ApJ, 608, 16

Zel'dovich, Y. B. 1970, A&A, 5, 84

%R 2010RMxAA..46..135R
%A Reyes-Ruiz, M.; Aceves, H.; Pérez-de-Tejada, H.
%F AA(Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B. C., Mexico.)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 135-144 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 144
%T On the origin of the tailward velocity of O+ ions over
the magnetic poles of Mars
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_mreyes.pdf
%K planets and satellites: individual (Mars), plasmas, solar wind
%B We numerically simulate the dynamics of a population of O+ ions of ionospheric origin picked-up by the solar wind in the dayside ionosheath of Mars. Their average velocity as they reach the magnetic polar regions of the planet is compared with in situ measurements of the Mars Express spacecraft. We find that the velocity of O+ ions measured over the magnetic poles of the planet, which is essentially tailward with very small y and z-components according to measurements, cannot be accounted for solely in terms of particle gyromotions. We suggest that the velocity of O+ ions over the magnetic poles of the planet is more probably the result of wave-particle interactions that mediate the transfer of momentum from the solar wind plasma to ionospheric plasma and newly born ions in the ionosheath.
%Z

Acuña, M., et al. 1998, Science, 279, 1676

Barabash, S., et al. 2006, Space Sci. Rev., 126, 113

Bertucci, C., et al. 2004, AdSR, 33, 1938

Bridge, H., Lazarus, A., Snyder, C., Smith, E., Davies, I., Coleman, P., & Jones, D. 1967, Science, 158, 1669

Crider, D. H., Brain, D. A., Acuña, M., Vignes, D., Mazelle, C., & Bertucci, C. 2004, Space Sci. Rev., 111, 203

Jackson, J. D. 1975, Classical Electrodynamics (2nd ed.; New York: Wiley)

Lesieur, M. 1991, Turbulence in Fluids (Dordrecht: Kluwer)

Luhmann, J. G., & Schwingenshuh, K. 1990, J. Geophys. Res., 95, 939

Lundin, R., Barabash, S., Fedorov, A., Holmström, M., Nilsson, H., Sauvaud, J.-A., & Yamauchi, M. 2008, Geophys. Res. Lett., 35, 9203

Lundin, R., et al. 1990, Geophys. Res. Lett., 17, 873

Lundin, R., et al. 2004, Science, 305, 1933

Pérez-de-Tejada, H. 1995, Space Sci. Rev., 72, 655 1.0155

ibidrule1998, J. Geophys Res., 103, 31499

ibidrule2001, J. Geophys. Res., 106, 211

ibidrule2004, AdSR, 33, 167

ibidrule2005, ApJ, 618, L145

Pérez-de-Tejada, H., & Dryer, M. 1976, J. Geophys. Res., 81, 2023

Pérez-de-Tejada, H., Intriligator, D. S., & Scarf, F. L. 1985, J. Geophys. Res., 90, 1759

Pérez-de-Tejada, H., & Lundin, R. 2008, AGU Fall Meeting, Abstract P13B-1307

Pérez-de-Tejada, H., Lundin, R., Durand-Manterola, H., & Reyes-Ruiz, M. 2009, J. Geophys. Res., 114, 106

Reyes-Ruiz, M., Díaz-Méndez, E., & Pérez-de-Tejada, H. 2008, A&A, 489, 1319

Reyes-Ruiz, M., & Pérez-de-Tejada, H. 2008, AGU Fall Meeting, Abstract P13B-1313

Reyes-Ruiz, M., Pérez-de-Tejada, H., Aceves, H., & Vázquez, R. 2009, arXiv:0812.1189

Riedler, W., et al. 1991, Planet. Space Sci., 39, 75

Romanov, S. A., Smirnov, V., & Vaisberg, O. 1979, Cosmic Res., 16, 603

Shefer, R., Lazarus, A., & Bridge, H. 1979, J. Geophys Res., 84, 2109

Spreiter, J., & Stahara, S. 1980, J. Geophys Res., 85, 7715

%R 2010RMxAA..46..145V
%A Voitsekhovich, V. V.; Orlov, V. G.
%F AA(Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 145-152 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 152
%T Amplitude fluctuations in curvature sensing:
comparison of two schemes
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_vvoitsekhovich.pdf
%K instrumentation: adaptive optics, techniques: high angular resolution
%B The influence of amplitude fluctuations on the quality of phase reconstruction in curvature sensing is investigated. Two curvature schemes are compared: one with two symmetrically-defocused images (Roddier scheme) and one with a single defocused image (Hickson scheme). It is shown that the accuracy of phase reconstruction with the Hickson scheme is strongly affected even by low-level amplitude fluctuations, while the Roddier scheme works well under quite strong amplitude fluctuations.
%Z
\begin{multicols}{2}
\bibitem{} Born, M., \& Wolf, E. 1987, Principles of Optics...
...ptotic Approximations of Integrals (Boston: Academic Press Inc.)
\end{multicols}

%R 2010RMxAA..46..153D
%A Dzib, S.; Loinard, L.; Rodríguez, L. F.
%F AA(Centro de Radioastronomía y Astrofísica
Universidad Nacional Autónoma de México, Morelia, Mexico)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 153-157 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 157
%T A Compact Radio Counterpart to the Energetic X-ray Pulsar Associated with the TeV Gamma-Ray Source J1813-178
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_sdzib.pdf
%K ISM: individual (G12.82-0.02), ISM: supernova remnants, pulsars: individual (CXOU J181335.1-174957)
%B We report the detection of a time-variable, compact radio source coincident with CXOU J181335.1-174957, the X-ray pulsar near the center of the young radio supernova remnant G12.82-0.02, which overlaps the compact TeV source HESS J1813-178. The compact radio source, named VLA J181335.1-174957, was detected in 4.86 GHz VLA observations made in 2006. New VLA observations made in 2009 do not detect the source at a level 1.9±0.7 times (2.8$ \sigma$) lower than that of 2006. We suggest that VLA J181335.1-174957 may be related to one of the recently detected classes of variable radio pulsars but cannot reach a firmer conclusion.
%Z

Abdo, A. A., et al. 2009, ApJS, 183, 46

Aharonian, F., et al. 2005, Science, 307, 1938

Albert, J., et al. 2006, \apjl, 637, L41

Backer, D. C. 1970, \nat, 228, 42

Brogan, C. L., Gaensler, B. M., Gelfand, J. D., Lazendic, J. S., Lazio, T. J. W., Kassim, N. E., & McClure-Griffiths, N. M. 2005, \apjl, 629, L105

Cameron, P. B., et al. 2005, \nat, 434, 1112

Camilo, F., Ransom, S. M., Halpern, J. P., & Reynolds, J. 2007, \apjl, 666, L93

Deneva, J. S., et al. 2009 ApJ, 703, 2259

Fomalont, E. B., Windhorst, R. A., Kristian, J. A., & Kellerman, K. I. 1991, \aj, 102, 1258

Frail, D. A., Kulkarni, S. R., & Bloom, J. S. 1999, \nat, 398, 127

Freire, P. C. C. 2005, in ASP Conf. Ser. 328, Binary Radio Pulsars, ed. F. A. Rasio & I. H. Stairs (San Francisco: ASP), 405

Fruchter, A. S., Stinebring, D. R., & Taylor, J. H. 1988, \nat, 333, 237

Gaensler, B. M., et al. 2005, \nat, 434, 1104

Gotthelf, E. V., & Halpern, J. P. 2009, \apjl, 700, L158

Granot, J., et al. 2006, \apj, 638, 391

Halpern, J. P., Gotthelf, E. V., Becker, R. H., Helfand, D. J., & White, R. L. 2005, \apjl, 632, L29

Helfand, D. J., Becker, R. H., & White, R. L. 2005, arXiv:astro-ph/0505392

Helfand, D. J., Gotthelf, E. V., Halpern, J. P., Camilo, F., Semler, D. R., Becker, R. H., & White, R. L. 2007, ApJ, 665, 1297

Keane, E. F., Ludovici, D. A., Eatough, R. P., Kramer, M., Lyne, A. G., McLaughlin, M. A., & Stappers, B. W. 2010, MNRAS, 401, 1057

Kramer, M., Lyne, A. G., O'Brien, J. T., Jordan, C. A., & Lorimer, D. R. 2006, Science, 312, 549

Kuzmin, A. D. 2007, \apss, 308, 563

Lyne, A. G., Manchester, R. N., & Taylor, J. H. 1985, \mnras, 213, 613

Manchester, R. N., Hobbs, G. B., Teoh, A., & Hobbs, M. 2005, \aj, 129, 1993

McLaughlin, M. A., et al. 2006, \nat, 439, 817

Mereghetti, S. 2008, A&AR, 15, 225

Messineo, M., Figer, D. F., Davies, B., Rich, R. M., Valenti, E., & Kudritzki, R. P. 2008, \apjl, 683, L155

Reimer, O., Funk, S., Hinton, J. A., Tanaka, T., Ebisawa, K., & Anada, T. 2008, in AIP Conf. Ser. 1085, 4th International Meeting on High Energy Gamma-Ray Astronomy, ed. F. A. Aharonian, W. Hofman, & F. Rieger (New York: AIP), 376

Rickett, B. J. 1970, \mnras, 150, 67

Staelin, D. H., & Reifenstein, E. C., III 1968, Science, 162, 1481

Stinebring, D. R., et al. 2000, \apj, 539, 300

Ubertini, P., et al. 2005, ApJ, 629, L109

%R 2010RMxAA..46..159C
%A Cavichia, O.; Costa, R. D. D.; Maciel, W. J.
%F AA(Instituto de Astronomia, Geofísica e Ciências Atmosféricas
Universidade de São Paulo, Brazil)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 159-177 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 177
%T Planetary nebulae in the inner Milky Way:
new abundances
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_ocavichia.pdf
%K Galaxy: abundances, Galaxy: evolution, planetary nebulae: general, techniques: spectroscopic
%B The study of planetary nebulae in the inner-disk and bulge gives important information on the chemical abundances of elements such as He, N, O, Ar, Ne, and on the evolution of these abundances, which is associated with the evolution of intermediate-mass stars and the chemical evolution of the Galaxy.

We present accurate abundances of the elements He, N, S, O, Ar, and Ne for a sample of 54 planetary nebulae located towards the bulge of the Galaxy, for 33 of which the abundances are derived here for the first time. The abundances are obtained based on observations in the optical domain made at the National Laboratory for Astrophysics (LNA, Brazil). The data show a good agreement with other results in the literature, in the sense that the distribution of the abundances is similar to that of those works.
%Z

Acker, A., Marcout, J., Ochsenbein, F., Stenholm, B., & Tylenda, R. 1992, Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Part 1 and 2; Garching: ESO)

Alexander, J., & Balick, B. 1997, \aj, 114, 713

Aller, L. H. 1984, Physics of Thermal Gaseous Nebulae (Astrophysics and Space Science Library, vol. 112; Reidel, Dordrecht)

Andrievsky, S. M., Luck, R. E., Martin, P., & Lépine, J. R. D. 2004, \aap, 413, 159

Ballero, S. K., Matteucci, F., Origlia, L., & Rich, R. M. 2007, \aap, 467, 123

Cahn, J. H., Kaler, J. B., & Stanghellini, L. 1992, , 94, 399

Carigi, L., Peimbert, M., Esteban, C., & García-Rojas, J. 2005, \apj, 623, 213

Cardelli, J. A., Clayton, G. C., & Mathis, J. S. 1989, \apj, 345, 245

Chiappini, C., Górny, S., Stasinska, G., & Barbuy, B. 2009, \aap, 494, 591 (CGSB09)

Chiappini, C., Matteucci, F., & Romano, D. 2001, \apj, 554, 1044

Costa, R. D. D., Chiappini, C., Maciel, W. J., & de Freitas Pacheco, J. A. 1996, , 116, 249

Costa, R. D. D., de Freitas Pacheco, J. A., & Idiart, T. P. 2000, , 145, 467

Costa, R. D. D., Escudero, A. V., & Maciel, W. J. 2005, in AIP Conf. Proc. 804, Planetary Nebulae as Astronomical Tools, ed. R. Szczerba, G. Stasinska, & S. K. Górny (Melville: AIP), 252

Costa, R. D. D., & Maciel, W. J. 2006, in IAU Symp. 234, Planetary Nebulae in our Galaxy and Beyond, ed. M. J. Barlow & R. H. Méndez (Cambridge: Cambridge Univ. Press), 243

Costa, R. D. D., Maciel, W. J., & Escudero, A. V. 2008, Baltic Astron., 17, 321

Cuisinier, F., Acker, A., & Köppen, J. 1996, \aap, 307, 215 (CAK96)

Cuisinier, F., Maciel, W. J., Köppen, J., Acker, A., & Stenholm, B. 2000, \aap, 353, 543 (CMKAS00)

Daflon, S., & Cunha, K. 2004, \apj, 617, 1115

de Freitas-Pacheco, J. A., Barbuy, B., Costa, R. D. D., & Idiart, T. E. P. 1993, \aap, 271, 429

Escudero, A. V., & Costa, R. D. D. 2001, \aap, 380, 300

Escudero, A. V., Costa, R. D. D., & Maciel, W. J. 2004, \aap, 414, 211 (ECM04)

Exter, K. M., Barlow, M. J., & Walton, N. A. 2004, \mnras, 349, 1291 (EBW04)

Fitzpatrick, E. L. 1999, , 111, 63

Girard, P., Köppen, J., & Acker, A. 2007, \aap, 463, 265 (GKA07)

Górny, S. K., Stasinska, G., Escudero, A. V., & Costa, R. D. D. 2004, \aap, 427, 231 (GSEC04)

Gorny, S. K., Chiappini, C., Stasinska, G., & Cuisinier, F. 2009, \aap, 500, 1089

Gutenkunst, S., Bernard-Salas, J., Pottasch, S. R., Sloan, G. C., & Houck, J. R. 2008, \apj, 680, 1206

Kingdon, J., & Ferland, G. J. 1995, \apj, 442, 714

Kingsburgh, R. L., & Barlow, M. J. 1994, \mnras, 271, 257

Lattanzio, J.,& Forestini, M. 1999, in IAU Symp. 191, Asymptotic Giant Branch Stars, ed. T. Le Bertre, A. Lèbre, & C. Waelkens, (San Francisco: ASP), 31

Lecureur, A., et al. 2007, \aap, 465, 799

Maciel, W. J., Lago, L. G., & Costa, R. D. D. 2005, \aap, 433, 127

ibidrule2006, \aap, 453, 587

Maciel, W. J., & Pottasch, S. R. 1980, \aap, 88, 1

Maciel, W. J., & Quireza, C. 1999, \aap, 345, 629

Mathis, J. S. 1990, \araa, 28, 37

Peimbert, M., & Serrano, A. 1980, RevMexAA, 5, 9

Pequignot, D., Petitjean, P., & Boisson, C. 1991, \aap, 251, 680

Perinotto, M. 1991, \apjs, 76, 687 (P91)

Perinotto, M., & Morbidelli, L. 2006, \mnras, 372, 45

Perinotto, M., Morbidelli, L., & Scatarzi, A. 2004, \mnras, 349, 793 (PMS04)

Ratag, M. A., Pottasch, S. R., Dennefeld, M., & Menzies, J. W. 1992, \aap, 255, 255

ibidrule1997, , 126, 297 (RPDM97)

Rich, R. M. 1988, \aj, 95, 828

Rich, R. M., & Origlia, L. 2005, \apj, 634, 1293

Stanghellini, L., Shaw, R. A., & Villaver, E. 2008, \apj, 689, 194

Stasinska, G., Richer, M. G., & McCall, M. L. 1998, \aap, 336, 667

Torres-Peimbert, S., & Peimbert, M. 1977, RevMexAA, 2, 181

van Loon, J. T., et al. 2003, \mnras, 338, 857

Wang, W., & Liu, X.-W. 2007, \mnras, 381, 669 (WL07)

Weiland, J. L., et al. 1994, \apjl, 425, L81

Wesson, R., Liu, X.-W., & Barlow, M. J. 2005, \mnras, 362, 424

Zoccali, M., et al. 2006, \aap, 457, L1

Zoccali, M., et al. 2003, \aap, 399, 931

%R 2010RMxAA..46..179R
%A Raga, A. C.; Lora, V.; Smith, N.
%F AA(Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico.)
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 179-184 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 184
%T HH jets aligned perpendicular to elephant trunks
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_araga.pdf
%K ISM: Herbig-Haro objects, ISM: jets and outflows, ISM: kinematics and dynamics, stars: formation
%B We consider a system of outflows ejected from low mass young stars embedded in the tips of elephant trunks. We assume that these outflows have axes which are intrinsically perpendicular to the axes of the host elephant trunks. We then derive the distribution function expected for the angle between the projections of the outflow and elephant trunk axes on the plane of the sky. These distribution functions are useful for interpreting the alignments (or lack thereof) observed between HH outflow and elephant trunk axes in photoionized regions.
%Z

Bally, J., & Reipurth, B. 2003, AJ, 126, 893

Carlqvist, P., Gahm, G. F., & Kristen, H. 2003, A&A, 403, 399

Elmegreen, B. G. 1998, in ASP Conf. Ser. 148, Origins, ed. C. E. Woodward, J. M. Shull, & H. A. Thronson, Jr. (San Francisco: ASP), 150

Gahm, G. F., Carlqvist, P., Johansson, L. B., & Nicolic, S. 2006, A&A, 454, 201

Gritschneder, M., Naab, T., Walch, S., Burkert, A., & Heitsch, F. 2009, ApJ, 694, L26

Kajdic, P., & Raga, A. C. 2007, ApJ, 670, 1173

Lora, V., Raga, A. C., & Esquivel, A. 2009, A&A, 503, 477

Mackey, J., & Lim, A. J. 2010, MNRAS, in press

Mellema, G., Arthur, S. J., Henney, W. J., Iliev, I. T., & Shapiro, P. R. 2006, ApJ, 647, 397

Press, W. H., Teukolsky, S. A., Vetterling, W. T., & Flannery, B. P. 2007, Numerical Recipes (Cambridge: Cambridge Univ. Press)

Smith, N., Bally, J., & Brooks, K. 2004, AJ, 127, 2793

Smith, N., Bally, J., & Walborn, N. R. 2010, MNRAS, (submitted)

%R 2010RMxAA..46..185P
%A Peña, J. H.
%F AA()
%J Revista Mexicana de Astronomía y Astrofísica Vol. 46, pp. 185-187 (2010) (http://www.astroscu.unam.mx/~rmaa/)
%D 04/2010
%L 187
%T ERRATUM
%C (C) 2010; Instituto de Astronomía, Universidad Nacional Autónoma de México
%U http://www.astrosmo.unam.mx/rmaa/RMxAA..46-1/PDF/RMxAA..46-1_errata.pdf
%K ISM: Herbig-Haro objects, ISM: jets and outflows, ISM: kinematics and dynamics, stars: formation
%B No abstract specified
%Z

Lambert, D. L. Private communication

\string

About this document ...

This document was created using latex2html and the rmaa latex macros



rmaa@astroscu.unam.mx