Type Ia supernovae: constraints on baryonic dark matter

Details Type Ia supernovae: constraints on baryonic dark matter Type Ia supernovae: constraints on baryonic dark matter

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..222..467s&link_type=abstract

After the first three minutes. AIP Conference Proceedings, Volume 222, pp. 467-470 (1991).

Physics

Supernovae, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae

Scientific paper

We examine models in which the dark matter of galaxy halos is in the form of white dwarf (WDs). Major constraints, which have been previously neglected, result from the occurrence of Type Ia supernovae, which are the products of merging WDs in binary systems whose orbits decay due to the emission of gravitational wave radiation. The lack of observed supernovae in the outer regions of galaxy halos limits the fraction of binaries to <<1% in extant models of WD dominated halos, for standard Type Ia parameters. This binary fraction is much smaller than that believed typical for luminous stars, necessitating a further peculiarity in the star-formation process during formation of the dark halo.

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