Abstract Details

Name: SD Gouse
Affiliation: Department of Astronomy, Osmania University
Conference ID: ASI2021_380
Title : Orbital period variations in contact binaries based on TESS and ASAS databases
Authors and Co-Authors : S.D Gouse (Department of Astronomy, Osmania University, Hyderabad), K. Sriram (Department of Astronomy, Osmania University, Hyderabad)
Abstract Type :
Abstract Category : Stars, ISM and Galaxy
Abstract : We studied various binary star systems that go through a phase of orbital period change using “TRANSITING EXOPLANET SURVEY SATELLITE (TESS) and ASAS databases. Earlier Kepler satellite-based studies unveiled that nearly 10% of the contact binary star systems show the existence of a third body which explained their low angular momentum configuration. We have collected 100 variable stars data from TESS to perform an O-C diagram, whose orbital period is less than 5 days, but the present study was performed on those binaries whose orbital periods are less than one day. O-C studied were performed and calculations were done after obtaining ‘Time of Minima’ through the Period04. Change in the orbital period is the key point to understand the mass transfer among the components of contact binary systems. We found that few studies do show the presence of third bodies whereas other systems exhibit only increasing/decreasing period change. We derive mass transfer rate, orbital period change, and the orbital parameters of a possible third body in these systems.