Abstract Details

Name: Rukmini Jagirdar
Affiliation: Osmania University
Conference ID: ASI2020_288
Title : Photometric investigation of totally eclipsing contact binaries from ASAS, OGLE, HATNet, AST3 and TESS databases
Authors and Co-Authors : Rukmini J, Shanti Priya D, Raghu Prasad M & Ravi Raja P
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : Contact binaries form an interesting class of binaries which not only show mutual interactions through gravitationally bound periodic close orbits but also show dynamical interactions through mass transfers, angular momentum loss and modulation of their orbits due to presence of tertiary components and magnetic activity. They are important sources as distance indicators and best laboratories to study stellar evolutionary models. The current work highlights photometric studies of 61 totally eclipsing contact binaries from ASAS, OGLE, HATNet, AST3 and TESS databases. The physical parameters were derived using PHOEBE. The selected binaries fall in a range of short period (0.34-0.97d), low mass ratio (0.076-0.504), later (F5-M0) spectral types and wide range of _llout factors (3-85%). Based on obtained fillout factors, 5 were classified as shallow/marginal contact, 41 as over contact and 15 as deep contact binaries. The absolute parameters are compared with large database of well-studied binaries and their possible evolutionary states are discussed.