Eclipsing binaries in open clusters

Southworth, J.; Maxted, P.F.L.; Smalley, B.

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.

Citation

Southworth, J., Maxted, P., & Smalley, B. (2003). Eclipsing binaries in open clusters.

• Acceptance Date: Dec 18, 2003
• Publication Date: Dec 18, 2003
• Publisher: Astronomical Society of the Pacific
• Volume: 318
• Series Title: Astronomical Society of the Pacific Conference Series
• ISBN: 1-58381-179-6
• Keywords: stars: binaries: eclipsing, stars: binaries: close, stars: distances, stars: evolution, stars: abundances, open clusters and associations: general
• Publisher URL: https://aspbooks.org/a/volumes/article_details/?paper_id=161