2022MNRAS.514.1206L -
Mon. Not. R. Astron. Soc., 514, 1206-1216 (2022/July-3)
The massive system V375 Cassiopeia is a semidetached mass-transfer binary with a massive stellar companion.
LI F.-X., QIAN S.-B., ZHANG J., ZHU L.-Y., ZHAO E.-G. and LIAO W.-P.
Abstract (from CDS):
V375 Cassiopeia (V375 Cas) is an early B-type close binary with an orbital period of 1.4734273 d. Based on high-quality and continuous light curves from the Transiting Exoplanet Survey Satellite (TESS) and new low-resolution spectra, we have determined photometric solutions of the eclipsing binary using the Wilson-Devinney method. We have found that V375 Cas is a semidetached binary where the secondary component fills the critical Roche lobe. Meanwhile, its O - C diagram was constructed with the data spanning 122 yr. An upward parabolic variation is discovered to be superimposed on a cyclic modulation with a semi-amplitude of 0.0938 (±0.0143) d and a period of 118.74 (±12.87) yr. The parabolic change reveals a period increase at a rate of dp/dt = +5.42 ×10–7 d yr–. Both the semidetached configuration and the period increase suggest that V375 Cas is undergoing a late case A mass transfer from the less-massive component to the more-massive component. The cyclic change is attributed to be the effect of the light travel time via the presence of a third body. The minimum mass of the tertiary companion is estimated as M3 = 4.24 (±0.87) M☉, which orbits around the central eclipsing binary with a nearly circular orbit (e = 0.184). It is detected that the light contribution of the third body is about 8.0 per cent, indicating that it is a massive main-sequence star. All the results reveal that V375 Cas is a hierarchical triple system where a massive main-sequence star accompanies a massive semidetached mass-transfer binary at an orbital separation of 60.3 au.
Abstract Copyright:
© 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society
Journal keyword(s):
binaries: close - binaries: eclipsing - stars: evolution - stars: individual: V375 Cas
Status at CDS
:
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Simbad objects:
16
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