TIC 219006972: a compact, coplanar quadruple star system consisting of two eclipsing binaries with an outer period of 168 d

Author:

Kostov Veselin B12,Borkovits Tamás34567ORCID,Rappaport Saul A8,Powell Brian P1,Pál András9,Jacobs Thomas L10ORCID,Gagliano Robert11,Kristiansen Martti H12,LaCourse Daryll M13,Moe Maxwell14,Omohundro Mark15,Schmitt Allan R16,Schwengeler Hans M15,Terentev Ivan A15,Vanderburg Andrew17

Affiliation:

1. NASA Goddard Space Flight Center , 8800 Greenbelt Road, Greenbelt, MD 20771, USA

2. SETI Institute , 189 Bernardo Avenue, Suite 200, Mountain View, CA 94043, USA

3. Baja Astronomical Observatory of Szeged University , Szegedi út, Kt. 766, H-6500 Baja, Hungary

4. ELKH-SZTE Stellar Astrophysics Research Group , Szegedi út, Kt. 766, H-6500 Baja, Hungary

5. Konkoly Observatory , Research Centre for Astronomy and Earth Sciences, Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary

6. ELTE Gothard Astrophysical Observatory , Szent Imre h. u. 112, H-9700 Szombathely, Hungary

7. MTA-ELTE Exoplanet Research Group , Szent Imre h. u. 112, H-9700 Szombathely, Hungary

8. Department of Physics, Kavli Institute for Astrophysics and Space Research , M.I.T., Cambridge, MA 02139, USA

9. Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, MTA Centre of Excellence , Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary

10. Amateur Astronomer , 12812 SE 69th Place Bellevue, WA 98006, USA

11. Amateur Astronomer , Glendale, AZ 85308, USA

12. Brorfelde Observatory , Observator Gyldenkernes Vej 7, DK-4340 Tølløse, Denmark

13. Amateur Astronomer , 7507 52nd Place NE, Marysville, WA 98270, USA

14. Department of Physics & Astronomy, University of Wyoming , Laramie, WY 82071, USA

15. Citizen Scientist, c/o Zooniverse, Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK

16. Citizen Scientist, 616 W. 53rd. St., Apt. 101, Minneapolis , MN 55419, USA

17. Department of Astronomy, University of Wisconsin–Madison , Madison, WI 53706, USA

Abstract

ABSTRACTWe present the discovery of a new highly compact quadruple star system, TIC 219006972, consisting of two eclipsing binary stars with orbital periods of 8.3 and 13.7 d, and an outer orbital period of only 168 d. This period is a full factor of 2 shorter than the quadruple with the shortest outer period reported previously, VW LMi, where the two binary components orbit each other every 355 d. The target was observed by Transiting Exoplanet Survey Satellite in full-frame images in sectors 14–16, 21–23, 41, 48, and 49, and produced two sets of primary and secondary eclipses. These show strongly non-linear eclipse timing variations (ETVs) with an amplitude of ∼0.1 d, where the ETVs of the primary and secondary eclipses and of the two binaries are all largely positively correlated. This highlights the strong dynamical interactions between the two binaries and confirms the compact quadruple configuration of TIC 219006972. The two eclipsing binaries are nearly circular, whereas the quadruple system has an outer eccentricity of about 0.25. The entire system is nearly edge-on, with a mutual orbital inclination between the two eclipsing binary star systems of about 1 deg.

Funder

NKFIH

NASA

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. 101 eclipsing quadruple star candidates discovered in TESS full frame images;Monthly Notices of the Royal Astronomical Society;2023-09-27

2. BU Canis Minoris – the most compact known flat doubly eclipsing quadruple system;Monthly Notices of the Royal Astronomical Society;2023-07-06

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