TIC 454140642: A Compact, Coplanar, Quadruple-lined Quadruple Star System Consisting of Two Eclipsing Binaries
Kostov, Veselin B.; Powell, Brian P.; Rappaport, Saul A.; Borkovits, Tamás; Pál, András; Torres, Guillermo; Barclay, Thomas; Hellier, Coel; Kruse, Ethan; Latham, David W.; Berlind, Perry; Calkins, Michael L.; Esquerdo, Gilbert A.; Collins, Karen A.; Tokovinin, Andrei; Collins, Kevin I.; Palle, Enric; Zasche, Petr; Stockdale, Chris; Jensen, Eric L. N.; Tamayo, Daniel; Olmschenk, Greg; Schwarz, Richard P.; Murgas, Felipe; Orosz, Jerome A.; Conti, Dennis M.; Anderson, David; Uhlař, Robert; Mašek, Martin; Welsh, William F.; West, Richard; Kamler, Jacob; Brown, Peyton
United States, Hungary, Chile, Czech Republic, United Kingdom, Spain, Australia
Abstract
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.