The Galactic O-Star Spectroscopic Survey (GOSSS). III. 142 additional O-type systems


J. Maíz Apellániz, A. Sota, J. I. Arias, R. H. Barbá, N. R. Walborn, S. Simón-Díaz, I. Negueruela, A. Marco, J. R. S. Leão, A. Herrero, R. C. Gamen, and E. J. Alfaro

CAB (CSIC-INTA), IAA-CSIC, ULS, ULS, STScI, IAC+ULL, UA, UA+UF, UFRN, IAC+ULL, CONICET+UNLP, and IAA-CSIC

This is the third installment of GOSSS, a massive spectroscopic survey of Galactic O stars, based on new homogeneous, high signal-to-noise ratio, R~2500 digital observations selected from the Galactic O-Star Catalog (GOSC). In this paper we present 142 additional stellar systems with O stars from both hemispheres, bringing the total of O-type systems published within the project to 590. Among the new objects there are 20 new O stars. We also identify 11 new double-lined spectroscopic binaries (SB2s), of which 6 are of O+O type and 5 of O+B type, and an additional new tripled-lined spectroscopic binary (SB3) of O+O+B type. We also revise some of the previous GOSSS classifications, present some egregious examples of stars erroneously classified as O-type in the past, introduce the use of luminosity class IV at spectral types O4-O5.5, and adapt the classification scheme to the work of Arias et al. (2016).

Reference: Accepted for publication in ApJS
Status: Manuscript has been accepted

Weblink: http://arxiv.org/abs/1602.01336

Comments:

Email: jmaiz@cab.inta-csic.es