Eclipsing Binary Stars in the OGLE-III Galactic Disk Fields

P. Pietrukowicz; P. Mroz; I. Soszynski; A. Udalski; R. Poleski; M. K. Szymanski; M. Kubiak; G. Pietrzynski; L. Wyrzykowski; K. Ulaczyk; S. Kozlowski; J. Skowron

arXiv · 1306.6324

Eclipsing Binary Stars in the OGLE-III Galactic Disk Fields

P. Pietrukowicz·P. Mroz·I. Soszynski·A. Udalski·R. Poleski·M. K. Szymanski·M. Kubiak·G. Pietrzynski·L. Wyrzykowski·K. Ulaczyk·S. Kozlowski·J. Skowron

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Abstract

We present the analysis of 11 589 eclipsing binary stars identified in twenty-one OGLE-III Galactic disk fields toward constellations of Carina, Centaurus, and Musca. All eclipsing binaries but 402 objects are new discoveries. The binaries have out-of-eclipse brightness between I=12.5 mag and I=21 mag. The completeness of the catalog is estimated at a level of about 75%. Comparison of the orbital period distribution for the OGLE-III disk binaries with systems detected in other recent large-scale Galactic surveys shows the maximum around 0.40 d and an almost flat distribution between 0.5 d and 2.5 d, indepedent of population. Ten doubly eclipsing systems and one eclipsing-ellipsoidal object were found among thousands of variables. Nine of them are candidates for quadruple systems. We also identify ten eclipsing subdwarf-B type binary stars and numerous eclipsing RS CVn type variables. All objects reported in this paper are part of the OGLE-III Catalog of Variable Stars.

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P. Pietrukowicz, P. Mroz, I. Soszynski, A. Udalski, R. Poleski, M. K. Szymanski, M. Kubiak, G. Pietrzynski, L. Wyrzykowski, K. Ulaczyk, S. Kozlowski, J. Skowron. 2013-06-26. Eclipsing Binary Stars in the OGLE-III Galactic Disk Fields. https://arxiv.org/abs/1306.6324

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