A New Evolutionary Channel to Type Ia Supernovae

Details A New Evolutionary Channel to Type Ia Supernovae A New Evolutionary Channel to Type Ia Supernovae

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...9e..30c&link_type=abstract

Supernovae: One Millennium After SN1006, 26th meeting of the IAU, Joint Discussion 9, 17-18 August 2006, Prague, Czech Republic,

Physics

Scientific paper

Introduction: Recent investigations on the delay time of type Ia supernovae have set useful constraints on the progenitors of type Ia supernovae. Methods: Here we calculate the evolution of a white dwarf binary with a relatively low-mass donor star in close orbits. We assume that a small part of the transferred material forms a circumbinary disk, which extracts orbital angular momentum from the binary. Results: We find that the mass transfer in this case can be accelerated, and the white dwarf can accumulate mass efficiently to reach the Chandrasekhar mass, thus suggesting a new evolutionary channel to type Ia supernovae. Discussion: Our results also suggest the existence of rapidly accreting white dwarfs with a very low-mass donor star.

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