Doubly eclipsing systems

0539339 - FZÚ 2021 RIV FR eng J - Článek v odborném periodiku
Zasche, P. - Vokrouhlický, D. - Wolf, M. - Kučáková, H. - Kára, J. - Uhlář, R. - Mašek, Martin - Henzl, Z. - Cagaš, P.
Doubly eclipsing systems.
Astronomy & Astrophysics. Roč. 630, Oct (2019), s. 1-14, č. článku A128. ISSN 0004-6361. E-ISSN 1432-0746
Grant CEP: GA MŠMT LTT18004; GA MŠMT LM2015038; GA MŠMT EF16_013/0001402
Grant ostatní: OP VVV - AUGER-CZ(XE) CZ.02.1.01/0.0/0.0/16_013/0001402
Institucionální podpora: RVO:68378271
Klíčová slova: binaries: eclipsing * stars: fundamental parameters * stars: early-type * Magellanic Clouds
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 5.636, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1051/0004-6361/201936328

We analysed photometric data for eclipsing binaries provided by the OGLE survey and we focused on the LMC fields. We found a large number of new doubly eclipsing systems (our discoveries are three times more numerous than the previously known cases in this dataset). In order to prove relative motion of the binaries about a common centre of mass, we made use of the fact that OGLE photometry covers several years. With a typical orbital period of days for the observed binaries, we sought eclipse time variations (ETVs) on the timescale comparable to a decade (this is the same method used for an archetype of the doubly eclipsing system, namely V994 Her). In the cases where we were able to detect the ETV period, the difference between the inner and outer periods in the quadruple system is large enough. This allows us to interpret ETVs primarily as the light-time effect, thus providing an interesting constraint on masses of the binaries.
Trvalý link: http://hdl.handle.net/11104/0317029