NOAO >   Observing Info >   Approved Programs >   2011B-0191

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Proposal Information for 2011B-0191


PI: Stephane Vennes, Astronomicky ustav, AV CR, vennes@sunstel.asu.cas.cz
Address: Stellar Department, Fricova 298, Ondrejov 251 65, Czech Republic

CoI: Adela Kawka, Astronomicky ustav, AV CR
CoI: Peter Nemeth, Astronomicky ustav, AV CR
CoI: Simon O'Toole, Australian Astronomical Observatory

Title: Hot subdwarf binaries in the GALEX survey

Abstract: We will investigate the role played by close binary companions in the formation and evolution of extreme horizontal-branch (EHB) stars. We propose to obtain high-dispersion spectra of a sample of hot subdwarf stars and identify new close binaries from a set of radial velocity measurements. The binaries will be marked for additional observations and the period and mass functions will eventually help in constraining the nature of the companions. Double degenerate systems such as these are part of the population generating such events as AM CVn binaries and Type 1a supernovae.


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 >   2011B-0191

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