NOAO >   Observing Info >   Approved Programs >   2009A-0255

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Proposal Information for 2009A-0255


PI: Douglas R. Gies, Georgia State University, gies@chara.gsu.edu
Address: Physics Department, P.O. Box 4106, Atlanta, GA 30302-4106, USA

CoI: Stephen Williams, Georgia State University
CoI: Rachel Matson, Georgia State University

Title: Massive Eclipsing Binary Stars

Abstract: Massive stars are rare objects in the Galaxy and there are only a small number of O-stars known in those favored eclipsing binaries, the gold standard for mass and radius determinations. Recently a significant number of new massive eclipsing binaries have been revealed through all sky photometric studies, and our goal here is to obtain high quality radial velocity curves for six systems of particular interest using the CTIO 1.5 m and Bench Mounted Echelle spectrograph. The joint spectroscopic and photometric analysis will yield masses, radii, and other physical properties for the component stars, and these in turn will provide key benchmarks for comparison with stellar evolutionary codes.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2009A-0255

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