Abstract Details

Name: MAMATHA RANI GADDAM
Affiliation: Department of Astronomy Osmania University
Conference ID: ASI2020_233
Title : Possible Third bodies in binary systems in M67 Open Cluster
Authors and Co-Authors : G.Mamatha Rani and Dr.K.Sriram
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : We present a photometric study of the M67 open cluster based on Kepler and JCBT 1.3m telescope data. We discuss, specifically, the systems AH Cnc and EV Cnc that are contact binary systems and ES Cnc a detached binary system (Yakut et al 2009). AH Cnc and EV Cnc were also observed by Kepler K2 mission campaign 5 and campaign 16 while ES Cnc was observed in campaign 5 and campaign 18. The O-C analysis of AH Cnc, a low mass ratio system q~0.1 with a totality, shows a secular orbital period change and its residuals present signatures of a tertiary companion to the binary. The light curve of EV Cnc exhibits an asymmetry at the maxima termed as the O'Connell effect and we find that asymmetry in itself is varying. The O-C residuals of this system shows LITE variations indicating the presence of a third body. The LITE variations exhibited by AH and EV Cnc are modelled to obtain third body parameters, including its mass, and the obtained results will be discussed. Photometric studies of ES Cnc which is a blue-straggler eclipsing system in M67, shall also be presented and its modelled light curve solutions will be discussed.