Radio Continuum Emission from FS CMa Stars

Luis F. Rodriguez(1,2), Alejandro Baez-Rubio(3,1), and Anatoly S. Miroshnichenko(4)

1- Centro de Radiostronomia y Astrofisica, UNAM, A. P. 3-72, (Xangari), 58089 Morelia, Michoacan, Mexico; 2- Astronomy Department, Faculty of Science, King Abdulaziz University, P.O.Box 80203, Jeddah 21589, Saudi Arabia; 3- Centro de Astrobiologia (CSIC/INTA), Ctra. de Torrejon a Ajalvir km 4, 28850 Torrejon de Ardoz, Madrid, Spain; 4- Department of Physics and Astronomy, University of North Carolina,Greensboro, NC 27402 USA

The FS CMa stars exhibit bright optical emission-line spectra and strong IR excesses. Very little is known of their radio characteristics.We analyzed archive Very Large Array data to search for radio continuum emission in a sample of them. There are good quality data for seven of the $sim$40 known FS CMa stars. Of these seven stars, five turn out to have associated radio emission. Two of these stars, CI Cam and MWC 300, have been previously reported in the literature as radio emitters. We present and briefly discuss the radio detection of the other three sources: FS CMa (the prototype of the class), AS 381, and MWC 922. The radio emission is most probably of a free-free nature but additional observations are required to better characterize it.

Reference: To appear in Revista Mexicana de Astronomia y Astrofisica
Status: Manuscript has been accepted