Progenitors Of Type Ia Supernovae In Early Type Galaxies

Details Progenitors Of Type Ia Supernovae In Early Type Galaxies Progenitors Of Type Ia Supernovae In Early Type Galaxies

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.4510g&link_type=abstract

American Astronomical Society, HEAD meeting #12, #45.10

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Although there is a nearly universal agreement that SNeIa are associated with the thermonuclear disruption of a CO white dwarf, the exact nature of their progenitors is still unknown. The single degenerate scenario envisages a white dwarf accreting matter from a non-degenerate companion in a binary system. Gravitational and nuclear energy of the accreted matter is released in the form of electromagnetic radiation and/or kinetic power of Classical Novae explosions *prior* to the Supernova event. We show that combined X-ray output of SNIa progenitors and statistics of Classical Novae predicted in the single degenerate scenario are inconsistent with X-ray and optical observations of nearby early type galaxies and galaxy bulges. White dwarfs accreting from a donor star in a binary system and detonating at the Chandrasekhar mass limit can account for no more than 5% of type Ia supernovae observed in old stellar populations.

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