Doubly eclipsing systems

0539339 - FZÚ 2021 RIV FR eng J - Journal Article
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
R&D Projects: GA MŠMT LTT18004; GA MŠMT LM2015038; GA MŠMT EF16_013/0001402
Grant - others:OP VVV - AUGER-CZ(XE) CZ.02.1.01/0.0/0.0/16_013/0001402
Institutional support: RVO:68378271
Keywords : binaries: eclipsing * stars: fundamental parameters * stars: early-type * Magellanic Clouds
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.636, year: 2019
Method of publishing: Limited access
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.
Permanent Link: http://hdl.handle.net/11104/0317029