TIC 454140642: A Compact, coplanar, quadruple-lined quadruple star system consisting of two eclipsing binaries

0551298 - FZÚ 2022 RIV GB eng J - Článek v odborném periodiku
Kostov, B.V. - Powell, B. P. - Torres, G. - Mašek, Martin … celkem 33 autorů
TIC 454140642: A Compact, coplanar, quadruple-lined quadruple star system consisting of two eclipsing binaries.
Astrophysical Journal. Roč. 917, č. 2 (2021), č. článku 93. ISSN 0004-637X. E-ISSN 1538-4357
Grant CEP: GA MŠMT EF16_013/0001403; GA MŠMT LTT18004; GA MŠMT LTT17006; GA MŠMT(CZ) EF18_046/0016010; GA MŠMT EF16_013/0001402; GA MŠMT(CZ) LM2018105; GA MŠMT(CZ) EF18_046/0016007
Grant ostatní: OP VVV - AUGERII.CZ(XE) CZ.02.1.01/0.0/0.0/18_046/0016010; OP VVV - AUGER-CZ(XE) CZ.02.1.01/0.0/0.0/16_013/0001402; OP VVV - CTA-CZ II(XE) CZ.02.1.01/0.0/0.0/18_046/0016007
Institucionální podpora: RVO:68378271
Klíčová slova: eclipsing binary stars * transit photometry * multiple stars * astronomy data analysis * astronomy data modeling
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 5.521, rok: 2021
Způsob publikování: Open access

We report the discovery of a compact, coplanar, quadruple-lined, eclipsing quadruple star system from Transiting Exoplanet Survey Satellite data, TIC 454140642, also known as TYC 0074-01254-1. The target was first detected in Sector 5 with a 30-minute cadence in full-frame images and then observed in Sector 32 with a 2-minute cadence. The light curve exhibits two sets of primary and secondary eclipses with periods of PA = 13.624 days (binary A) and PB = 10.393 days (binary B). Analysis of archival and follow-up data shows clear eclipse-timing variations and divergent radial velocities, indicating dynamical interactions between the two binaries and confirming that they form a gravitationally bound quadruple system with a 2 + 2 hierarchy. The Aa+Ab binary, Ba+Bb binary, and A-B system are aligned with respect to each other within a fraction of a degree: the respective mutual orbital inclinations are 0°25 (A versus B), 0°37 (A versus A-B), and 0°47 (B versus A-B).
Trvalý link: http://hdl.handle.net/11104/0326724