Abstract Details
| Name: Kaushar Vaidya Affiliation: Birla Institute of Technology and Science-Pilani Conference ID: ASI2016_716 Title : Optical Spectroscopy of X-ray Selected Young Stars in the Carina Nebula Authors and Co-Authors : Wen-Ping Chen,National Central University, Taiwan; Hsu-Tai Lee, Tainan Astronomical Education Area, Taiwan Abstract Type : Oral Abstract Category : Stars, The Milky Way Galaxy and its neighbours Abstract : We present low-resolution optical spectra for 29 X-ray sources identified as either massive star candidates or low-mass pre-main-sequence (PMS) star candidates in the clusters Trumpler 16 and Trumpler 14 of the Carina Nebula. Spectra of two more objects (one with an X-ray counterpart, and one with no X-ray counterpart), not originally our targets, but found close (∼3″) to two of our targets, are presented as well. Twenty early-type stars including an O8 star and seven B1-B2 stars, and eleven T Tauri stars, are identified. Most early-type stars are non-variable in X-ray emission. The X-ray hardness ratios of T Tauri stars are found to be consistent with those of the Orion T Tauri stars. The mean V-band photometric variability of T Tauri stars, is found to be ~0.1 mag, significantly larger than the mean V-band variability of all stars, ~0.04 mag. The addition of one O star and seven B1–B2 stars reported here contributes to an 11% increase of the known OB population in the observed field. The 11 T Tauri stars are the first ever confirmed low-mass PMS stars in the Carina Nebula region. |