High Velocity White Dwarfs from Type Ia Supernovae

Details High Velocity White Dwarfs from Type Ia Supernovae High Velocity White Dwarfs from Type Ia Supernovae

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.5607h&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #56.07; Bulletin of the American Astronomical Society, Vol. 34, p.1204

Astronomy and Astrophysics

Astronomy

Scientific paper

The single degenerate scenario for Type Ia supernovae predicts the post-supernova release of the donor star with a space velocity determined by the original binary orbital velocity. The mass transfer criteria for successful supernova ignition also place constraints on the mass of the donor. The combination of these two factors means that the great majority of high velocity donor remnants will be white dwarfs. We present models of the Type Ia supernova progenitors and antecedents in the Galaxy, and examine the donor remnant white dwarf population in the light of the current interest in high velocity white dwarfs. One potential discriminant between donor remnants and normal high velocity white dwarfs (from a thick disk or spheroid stellar population) is a determination of the binary fraction. White dwarfs which have their origin in disrupted close binaries will always be single.

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