Kostov, VB, Powell, BP, Torres, G, Borkovits, T, Rappaport, SA, Tokovinin, A, Zasche, P, Anderson, D, Barclay, T, Berlind, P, Brown, P, Calkins, ML, Collins, KA, Collins, KI, Conti, DM, Esquerdo, GA, Hellier, C, Jensen, ELN, Kamler, J, Kruse, E, Latham, DW, Mašek, M, Murgas, F, Olmschenk, G, Orosz, JA, Pál, A, Palle, E, Schwarz, RP, Stockdale, C, Tamayo, D, Uhlař, R, Welsh, WF and West, R (2021) TIC 454140642: A Compact, Coplanar, Quadruple-lined Quadruple Star System Consisting of Two Eclipsing Binaries. The Astrophysical Journal, 917 (2). 93 - 93. ISSN 0004-637X

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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 0fdg25 (A versus B), 0fdg37 (A versus A-B), and 0fdg47 (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.

Item Type: Article
Additional Information: The final version of this accepted manuscript and all relevant information related to it, including copyrights, can be found online at; https://iopscience.iop.org/article/10.3847/1538-4357/ac04ad
Subjects: Q Science > Q Science (General)
Q Science > QB Astronomy
Q Science > QB Astronomy > QB460 Astrophysics
Q Science > QB Astronomy > QB600 Planets. Planetology
Q Science > QB Astronomy > QB799 Stars
Q Science > QC Physics
Depositing User: Symplectic
Date Deposited: 16 Sep 2021 11:54
Last Modified: 23 Aug 2022 01:30
URI: https://eprints.keele.ac.uk/id/eprint/10027

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