Variability survey in the CoRoT SRa01 field: Implications of eclipsing binary distribution on cluster formation in NGC 2264

Abstract

Time-series photometry of the CoRoT field SRa01 was carried out with the Berlin Exoplanet Search Telescope II (BEST II) in 2008/2009. A total of 1,161 variable stars were detected, of which 241 were previously known and 920 are newly found. Several new, variable young stellar objects have been discovered. The study of the spatial distribution of eclipsing binaries revealed the higher relative frequency of Algols toward the center of the young open cluster NGC 2264. In general Algol frequency obeys an isotropic distribution of their angular momentum vectors, except inside the cluster, where a specific orientation of the inclinations is the case. We suggest that we see the orbital plane of the binaries almost edge-on.

18 pages, 8 figures, accepted for publication in ApJ

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• Linking the rotation of a cluster to the spins of its stars: The kinematics of NGC6791 and NGC6819 in 3D
• Transit Search from Antarctica and Chile - Comparison and Combination
• Constraining the initial conditions of NGC 2264 using ejected stars found in Gaia DR2
• Mon-735: A new low-mass pre-main sequence eclipsing binary in NGC 2264
• A modified CoRoT detrend algorithm and the discovery of a new planetary companion
• The Berlin Exoplanet Search Telescope II. Catalog of Variable Stars. I. Characterization of Three Southern Target Fields
• The CoRoT discovery of a unique triple-mode cepheid in the galaxy
• The Berlin Exoplanet Search Telescope II Catalog of Variable Stars. II. Characterization of the CoRoT SRc02 field
• An M dwarf Companion to an F-type Star in a young main-sequence binary
• A Catalog of 45,206 Hα Emission-line Stars from LAMOST MRS DR7