Abstract Details

Name: RAGHU PRASAD M
Affiliation: OSMANIA UNIVERSITY
Conference ID: ASI2020_235
Title : A Comprehensive study of SdB+dM binary from MUCHFUSS project
Authors and Co-Authors : Raghu Prasad M, Rukmini J, Shanti Priya D, Vinay Kumar G
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : Subdwarf (sdB) stars are core helium burning stars with a very thin hydrogen envelope that lie at the blue end of horizontal branch (or Extreme Horizontal Branch (EHB)). The object TYC 3315-1807-1 is a SdB+dM first reported by Kawka et al. (2010). Photometric data from the archives indicate the presence of a secondary companion causing a large reflection effect. Spectroscopic observations of the object were carried out from Vainu Bappu Observatory, Kavalur; to probe into the nature of secondary companion as well as to understand the Post Common-Envelope evolution of such objects. The Equivalent Widths (EW) of lines exhibits orbital phase dependent variations, indicating the probable contribution of secondary. Period variation study of the object was carried out using Times of Minima obtained from the literature suggesting a decrease in period. The evolutionary state of the system was evaluated on the basis of results obtained and is discussed.