V907 Sco switched to the eclipsing mode again

0572351 - FZÚ 2024 RIV US eng J - Journal Article
Zasche, P. - Vokrouhlický, D. - Barlow, B.N. - Mašek, Martin
V907 Sco switched to the eclipsing mode again.
Astronomical Journal. Roč. 165, č. 3 (2023), č. článku 81. ISSN 0004-6256. E-ISSN 1538-3881
R&D Projects: GA MŠMT LTT18004; GA MŠMT EF16_013/0001402; GA MŠMT(CZ) EF18_046/0016010
Research Infrastructure: AUGER-CZ II - 90102
Institutional support: RVO:68378271
Keywords : multiple stars * astrophysics
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.3, year: 2022
Method of publishing: Open access

V907 Scorpii is a unique triple system in which the inner binary component has been reported to have switched on and off eclipses several times in modern history. In spite of its peculiarity, observational data on this system are surprisingly scarce. Here we make use of the recent Transiting Exoplanet Survey Satellite observations, as well as our own photometric and spectroscopic data, to expand the overall data set and study the V907 Sco system in more detail. Our analysis provides both new and improved values for several of its fundamental parameters: (i) the masses of the stars in the eclipsing binary are 2.74 ± 0.02 M ⊙ and 2.56 ± 0.02 M ⊙, and (ii) the third component is a solar-type star with mass 1.06+0.11−0.10 M ⊙ (90% C.L.), orbiting the binary on an elongated orbit with an eccentricity of 0.47 ± 0.02 and a period of 142.01 ± 0.05 days.
Permanent Link: https://hdl.handle.net/11104/0343083