Times of light minima for V410 Aur

V410 Aur is a known deep and low-mass-ratio contact binary with a spectroscopically tertiary component and a visual companion. However, the physical and orbital properties of the tertiary are unknown. We constructed (O-C) curve with 117 new eclipse times and those collected from the literature, which shows a cyclical variation with a period of 25.44(+/-1.17)yr and a projected semimajor axis of 0.0348(+/-0.0021)d while it undergoes a long-term period decrease at a rate of dP/dt=-1.58x10^-7^d/yr. The cyclical variation is analyzed for the light-travel time effect. The minimum mass of the third body is determined as 1.39(+/-0.13)M_{sun} that is much larger than the inferred value (0.97M{sun}_) of spectroscopic investigation, which indicates that the spectroscopically tertiary is a single-lined spectroscopic binary with an unseen component. The maximum orbital semimajor axis 6.19(+/-0.67)au of the third body is determined. Gaia detected a visual companion to V410 Aur at practically the same distance from the Sun nicely confirming the physical bond. These results reveal that V410 Aur contains a single-lined spectroscopic binary with a visual companion in a quintuple stellar system. TESS photometric solutions confirmed that V410 Aur is a deep overcontact binary with a fill-out factor of 73.83(88)% where the additional light contribution is about 24.80(18)%. The continuous variations of light curves are explained by the evolution of a dark spot on the more massive component. The parabolic variation in the (O-C) curve may be caused by the mass transfer from the massive component to the less massive one in the deep overcontact binary.

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/927/183
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/927/183
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/927/183
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/927/183
Provenance
Creator Liao W.-P.; Qian S.-B.; Shi X.-D.; Li L.-J.; Liu N.-P.; He J.-J.; Zang L.,Li P.
Publisher CDS
Publication Year 2024
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy