TIC 454140642: A Compact, Coplanar, Quadruple-lined Quadruple Star System Consisting of Two Eclipsing Binaries
Abstrakt
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 P ( A ) = 13.624 days (binary A) and P ( B ) = 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.degrees 25 (A versus B), 0.degrees 37 (A versus A-B), and 0.degrees 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.