NOAO >   Observing Info >   Approved Programs >   2011A-0206

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Proposal Information for 2011A-0206


PI: Carles Badenes, Weizmann Institute of Science, carles@astro.tau.ac.il
Address: Particle Physics and Astrophysics, Rehovot 76100, Israel

CoI: Mukremin Kilic, Harvard CfA
CoI: Thomas Matheson, NOAO
CoI: Susan Thompson, NASA Ames
CoI: Fergal Mullally, NASA Ames

Title: Spectroscopic follow-up of the SWARMS survey

Abstract: We propose to continue the spectroscopic follow-up of short period double white dwarf (WD) binaries discovered in the SDSS data base by the SWARMS survey. These systems might be progenitors of Type Ia Supernovae (SNe), or end in accretion-induced collapse to a neutron star or a massive WD, or lead to one of an emerging class of fast, faint transients with low ejected mass like SN2002bj and SN2005E. Time resolved spectroscopy is crucial to determine the radial velocity curves, establish the periods, refine the mass estimates, discriminate the likely final fates, and calculate the merging timescales. These observations will allow us to derive a reliable rate for the merging of binary WDs of different masses in the Galactic disk.


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 >   2011A-0206

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