Comprehensive study of a neglected contact binary TYC 5532-1333-1

Author:

Devarapalli S P1ORCID,Jagirdar R1,Prasad R M1,Thomas V S2,Ahmed S A3,Gralapally R1,Das J P1

Affiliation:

1. Department of Astronomy, Osmania University, Hyderabad 500007, India

2. The University of Akron, Akron, OH 44325, USA

3. Institute of Physics and Astronomy, University of Potsdam, D-14469 Potsdam, Germany

Abstract

ABSTRACT A comprehensive photometric and spectroscopic analysis of the variable TYC 5532-1333-1 (TYC) along with an investigation of its orbital period variation is presented for the first time. The B- and V-band photometric study indicates that TYC is an intermediate contact binary with degree of contact and mass ratio of 34 per cent and ∼0.24, respectively. The derived equivalent widths from the spectroscopic study of Hα and   Na-I lines reveal phase-dependent variation and mutual correlation. Using the available times of minimum light, an investigation of orbital period variation shows a long-term decrease at a rate of 3.98 × 10 −6 d yr−1. Expected causes for such decline in the orbital period could be angular momentum loss and a quasi-sinusoidal variation due to light-time effect probably caused by a third-body companion. The minimum mass of the third body (M3) was derived to be $0.65 \, \mathrm{M}_{\odot }$. Our presented study is an attempt to evaluate and understand the evolutionary state of above-mentioned neglected contact binary.

Funder

Department of Science & Technology

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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