Spectroscopic follow-up of the SWARMS survey

Details Spectroscopic follow-up of the SWARMS survey Spectroscopic follow-up of the SWARMS survey

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011noao.prop..206b&link_type=abstract

NOAO Proposal ID #2011A-0206

Physics

Scientific paper

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.

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