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      Eclipsing binaries in open clusters

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          Abstract

          Accurate physical parameters have been determined for two early-type detached eclipsing binaries in the open cluster h Persei (NGC 869). Masses accurate to 1.5% are derived from high-resolution spectroscopy and radii accurate to 4--6% have been obtained from fitting the existing light curves. The four stars are placed in the mass radius plane and compared to the theoretical stellar models of the Granada Group. The best-fitting models have a low metallicity of approximately Z=0.01 and a high helium abundance of Y=0.34. This is the first determination of the bulk metallicity of the Perseus Double Cluster. Recent studies have assumed a solar metallicity so their results should be reviewed.

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          Journal
          18 December 2003
          Article
          astro-ph/0312506
          b30ce28a-2996-4579-abe1-7480d0097e63
          History
          Custom metadata
          ASP Conf.Ser.318:218,2004
          4 pages, 5 figures. To appear in Spectroscopically and Spatially Resolving the Components of Close Binary Stars, ASP Conf. Series, 2004
          astro-ph

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