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Eclipsing Binaries: Tools for Calibrating the Extragalactic Distance Scale

Published online by Cambridge University Press:  12 July 2007

Alceste Z. Bonanos
Alceste Z. Bonanos*
Affiliation:
Carnegie Institution of Washington, 5241 Broad Branch Road, Washington, DC 20015, USA email: [email protected]
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Abstract

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In the last decade, over 7000 eclipsing binaries have been discovered in the Local Group through various variability surveys. Measuring fundamental parameters of these eclipsing binaries has become feasible with 8 meter class telescopes, making it possible to use eclipsing binaries as distance indicators. Distances with eclipsing binaries provide an independent method for calibrating the extragalactic distance scale and thus determining the Hubble constant. This method has been used for determining distances to eclipsing binaries in the Magellanic Clouds and the Andromeda Galaxy and most recently to a detached eclipsing binary in the Triangulum Galaxy by the DIRECT Project. The increasing number of eclipsing binaries found by microlensing and variability surveys also provide a rich database for advancing our understanding of star formation and evolution.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S240: Binary Stars as Critical Tools & Tests in Contemporary Astrophysics , August 2006 , pp. 79 - 87
Copyright
Copyright © International Astronomical Union 2007

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