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Name: A VIJAYA Affiliation: OSMANIA UNIVERSITY Conference ID: ASI2020_202 Title : Photometric and spectroscopic observations of few Beta Lyrae type binaries Authors and Co-Authors : Mrs A. Vijaya and Dr.K. Sriram Abstract Type : Poster Abstract Category : Stars, ISM and Galaxy Abstract : We present the photometric and spectroscopic observations of few Beta Lyrae type binaries observed from JCBT and HCT, IIA in the years 2018 and 2019. We modelled the light curves using WD method and constrain the mass ratio and inclination of the systems. Since these systems are going through mass transfer phase, we performed the period variation studies. Some of them show strong signature of period change of dp/dt ~10^-8 s/yr. Spectroscopic data were collected at different orbital phases for selected systems. In general the H alpha line show strong correlation with orbital period in contact binaries and similar results are observed by us for these Beta Lyrae type systems. We also used Kepler light curves to evaluate the photometric and binary elements. |