Abstract Details
| Name: Amith Govind Affiliation: Christ University Conference ID: ASI2017_1160 Title : Classical Be Stars and their Different Hα Profiles Authors and Co-Authors : Amith Govind (Christ University, Bengaluru), Devarshi Choudhury (Christ University, Bengaluru), Shruthi S Bhat (Christ University, Bengaluru), Paul K T (Christ University, Bengaluru), Annapurni Subramaniam (Indian Institute of Astrophysics, Bengaluru) Abstract Type : Poster Abstract Category : Stars,ISM and the Galaxy Abstract : We present the preliminary results of the spectroscopic study of a few Classical Be Stars. A Classical Be star is defined as a non-supergiant B-type star whose spectrum has, or had at sometime, one or more Balmer lines in emission. The emission lines originate from a circumstellar disk which is formed by the material ejected from the star and the actual mechanism for this ejection is still unknown. The properties of the disk are studied spectroscopically to understand the kinematics as well as the distribution of material in the circumstellar disk. Medium resolution spectra of these Be stars were obtained using the Universal Astronomical Grating Spectrograph (UAGS) at the Cassegrain focus of the 1 metre reflector of Vainu Bappu Observatory, Kavalur, India. Their time series spectra were obtained between the period February-May 2016 in the wavelength range 6100-6800Å. The spectra were reduced and calibrated using the routines in IRAF. From the spectra, different emission line parameters have been deduced. We also discuss different Hα profile types observed within the data set. |