CzeV1731: The unique doubly eclipsing quadruple system

0537280 - ASÚ 2021 RIV FR eng J - Článek v odborném periodiku
Zasche, P. - Henzl, Z. - Lehmann, H. - Pepper, J. - Powell, B. P. - Kostov, V. B. - Barclay, T. - Wolf, M. - Kučáková, Hana - Uhlář, R. - Mašek, Martin - Palafouta, S. - Gazeas, K. - Stassun, K. - Gaudi, B. S. - Rodriguez, J. E. - Stevens, D. J.
CzeV1731: The unique doubly eclipsing quadruple system.
Astronomy & Astrophysics. Roč. 642, October (2020), č. článku A63. ISSN 0004-6361. E-ISSN 1432-0746
Grant CEP: GA MŠMT LTT17006
Výzkumná infrastruktura: CTA-CZ - 90046
Institucionální podpora: RVO:67985815 ; RVO:68378271
Klíčová slova: eclipsing binaries * spectroscopic * stars: fundamental parameters
Obor OECD: Astronomy (including astrophysics,space science); Astronomy (including astrophysics,space science) (FZU-D)
Impakt faktor: 5.803, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1051/0004-6361/202038656

We report the discovery of the relatively bright (V=10.5 mag), doubly eclipsing 2+2 quadruple system CzeV1731. This is the third known system of its kind, in which the masses are determined for all four stars and both the inner and outer orbits are characterized. The inner eclipsing binaries are well-detached systems moving on circular orbits: pair A with period P-A=4.10843 d and pair B with P-B=4.67552 d. The inner binaries contain very similar components (q approximate to 1.0), making the whole system a so-called double twin. The stars in pair B have slightly larger luminosities and masses and pair A shows deeper eclipses. All four components are main-sequence stars of F/G spectral type. The mutual orbit of the two pairs around the system barycenter has a period of about 34 yr and an eccentricity of about 0.38. However, further observations are needed to reveal the overall architecture of the whole system, including the mutual inclinations of all orbits. This is a promising target for interferometry to detect the double at about 59 mas and Delta M-bol< 1 mag.
Trvalý link: http://hdl.handle.net/11104/0315024