Type Ia Supernovae and the Single Common Envelope Scenario

Details Type Ia Supernovae and the Single Common Envelope Scenario Type Ia Supernovae and the Single Common Envelope Scenario

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21732403b&link_type=abstract

American Astronomical Society, AAS Meeting #217, #324.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

Double degenerate white dwarfs systems (DDWDs) are still very probable progenitors for Type Ia supernovae (SNe Ia). We have investigated scenarios for the formation of DDWDs. Using Monte Carlo simulations, a population of SNe Ia progenitors was synthesized. According to the channel that we considered, the evolution of massive "twins” was followed until they reached the giant phase at which point some of them came into contact and formed a single common envelope. In many cases, a double degenerate system was formed as a result of this process. We found that a significant proportion of the "prompt” population of SNe Ia can be explained in this way. We believe that a significant fraction of the remaining SNe Ia progenitor population can be obtained by considering stable Roche lobe overflow while one star is still on the main sequence, followed by a phase of common envelope evolution (i.e., the single-degenerate channel).

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