TIC 454140642: A Compact, Coplanar, Quadruple-lined Quadruple Star System Consisting of Two Eclipsing Binaries

Kostov, Veselin B.; Powell, Brian P.; Torres, Guillermo; Borkovits, Tamás; Rappaport, Saul A.; Tokovinin, Andrei; Zasche, Petr; Anderson, David; Barclay, Thomas; Berlind, Perry; Brown, Peyton; Calkins, Michael L.; Collins, Karen A.; Collins, Kevin I.; Conti, Dennis M.; Esquerdo, Gilbert A.; Hellier, Coel; Jensen, Eric L. N.; Kamler, Jacob; Kruse, Ethan; Latham, David W.; Mašek, Martin; Murgas, Felipe; Olmschenk, Greg; Orosz, Jerome A.; Pál, András; Palle, Enric; Schwarz, Richard P.; Stockdale, Chris; Tamayo, Daniel; Uhlař, Robert; Welsh, William F.; West, Richard
Referencia bibliográfica

The Astrophysical Journal

Fecha de publicación:
8
2021
Número de autores
33
Número de autores del IAC
2
Número de citas
25
Número de citas referidas
24
Descripción
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). The A-B system has an orbital period of 432 days-the second shortest of the confirmed quadruple systems-and an orbital eccentricity of 0.3.
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