Abstract Details

Name: Ranjani Lakshminarayan
Affiliation: Christ University
Conference ID: ASI2017_1338
Title : Emission line variabilities of Classical Be-Stars
Authors and Co-Authors : Ranjani L Kandi1, K T Paul1, Annapurni Subhramaniam2 1 Department of Physics, Christ University, Hosur Road, Bengaluru-560029, Karnataka 2 Indian Institute of Astrophysics, II Block, Kormangala, Bengaluru-560034, Karnataka
Abstract Type : Poster
Abstract Category : Stars,ISM and the Galaxy
Abstract : We present the emission line variabilities of 25 Classical Be-Stars which show long term variations of about 10-15 years. All the spectra are assembled from an archival database called BeSS. It is a complete catalog for Classical Be-Stars and Herbig Ae/Be-stars. Double-peaked Hα emission line is the most common profile which displays violet and red peaks due to the doppler effect. In about two thirds of the Be stars, the V/R ratio is equal to unity. In others, the two peaks are of asymmetric intensities and cyclically variable with a period ranging from few days to years to few decades. We have used IRAF for the spectral analysis and the long term variability is studied using a time series graph for each of the stars. The period of variability for few of the stars along with the disk radii in terms of stellar radii are calculated for all the 25 stars