Two Detached Eclipsing Binaries near the Turnoff of the Open Cluster NGC 6819

Type Conference Paper
Names Mark Jeffries, E. L. Sandquist, R. D. Mathieu, A. M. Geller, J. A. Orosz, M. D. Shetrone
Proceedings Title Bulletin of the American Astronomical Society
Conference Name American Astronomical Society, AAS Meeting #217, #152.34
Volume 43
Pages 15234
Date January 1, 2011
Library Catalog NASA ADS
Abstract We analyze extensive BVRcI c photometry and radial velocity measurements for Auner 259 and 537, two detached eclipsing binaries (DEBs) that are double-lined members of the moderately old ( 2.5 Gyr) cluster NGC 6819. We present results of binary star modeling to measure characteristics of the components, focusing on stellar masses and radii because the binaries reside near the cluster turnoff in a color-magnitude diagram. The masses and radii will provide constraints on the cluster age. We gratefully acknowledge funding from the National Science Foundation under grant AST-0908536 and AST-0908082.
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