TY  - JOUR
A1  - Devarapalli, Shanti Priya
A1  - Jagirdar, Rukmini
A1  - Prasad, Manjunath R.
A1  - Thomas, Vineet S.
A1  - Ahmed, Syed Aslam
A1  - Gralapally, Raghavendra
A1  - Das, Jesmin Permala Lohy
T1  - Comprehensive study of a neglected contact binary TYC 5532-1333-1
JF  - Monthly notices of the Royal Astronomical Society
N2  - 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 similar to 0.24, respectively. The derived equivalent widths from the spectroscopic study of H alpha 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 x 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 (M-3) was derived to be 0.65 M-circle dot. Our presented study is an attempt to evaluate and understand the evolutionary state of above-mentioned neglected contact binary.
KW  - line: profiles
KW  - methods: observational
KW  - techniques: photometric
KW  - techniques: spectroscopic
KW  - stars: activity
KW  - binaries: eclipsing
Y1  - 2019
U6  - https://doi.org/10.1093/mnras/staa031
SN  - 0035-8711
SN  - 1365-2966
VL  - 493
IS  - 2
SP  - 1565
EP  - 1573
PB  - Oxford Univ. Press
CY  - Oxford
ER  -