TIC 168789840: a sextuply eclipsing sextuple star system

0551300 - FZÚ 2022 RIV US eng J - Journal Article
Powell, B. P. - Kostov, V. B. - Rappaport, S. A. - Mašek, Martin … Total 51 authors
TIC 168789840: a sextuply eclipsing sextuple star system.
Astronomical Journal. Roč. 161, č. 4 (2021), č. článku 162. ISSN 0004-6256. E-ISSN 1538-3881
R&D Projects: GA MŠMT LTT18004; GA MŠMT EF16_013/0001402; GA MŠMT(CZ) LM2018102
Grant - others:OP VVV - AUGER-CZ(XE) CZ.02.1.01/0.0/0.0/16_013/0001402
Institutional support: RVO:68378271
Keywords : eclipsing binary stars * transit photometry * multiple stars * astronomy data analysis * astrophysics - solar and stellar astrophysics
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.491, year: 2021
Method of publishing: Open access

We report the discovery of a sextuply eclipsing sextuple star system from TESS data, TIC 168789840, also known as TYC 7037-89-1, the first known sextuple system consisting of three eclipsing binaries. The target was observed in Sectors 4 and 5 during Cycle 1, with lightcurves extracted from TESS Full Frame Image data. It was also previously observed by the WASP survey and ASAS-SN. The system consists of three gravitationally bound eclipsing binaries in a hierarchical structure of an inner quadruple system with an outer binary subsystem. Follow-up observations from several different observatories were conducted as a means of determining additional parameters. The system was resolved by speckle interferometry with a 0''42 separation between the inner quadruple and outer binary, inferring an estimated outer period of ∼2 kyr. It was determined that the fainter of the two resolved components is an 8.217 day eclipsing binary, which orbits the inner quadruple that contains two eclipsing binaries with periods of 1.570 days and 1.306 days.
Permanent Link: http://hdl.handle.net/11104/0326726