Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2010-09-27
Acta Astronomica 60 (2010), 179
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
18 pages, 11 figures
Scientific paper
The tenth part of the OGLE-III Catalog of Variable Stars contains 125 Double Periodic Variables (DPVs) from the Large Magellanic Cloud. DPVs are semi-detached binaries which show additional variability with a period around 33 times longer than the orbital period. The cause of this long cycle is not known and previous studies suggest it involves circumbinary matter. We discuss the properties of the whole sample of the LMC DPVs and put more attention to particularly interesting objects which may be crucial for verifying hypothesis explaining long cycle variability. Secondary eclipses of one of the objects disappear during some orbital cycles and primary eclipses are deeper during long cycle minimum.
Kubiak Mateo M. M.
Pietrzynski Grzegorz
Poleski Radoslaw
Soszynski Igor
Szymanski Michal K.
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