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

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc..968...57c&link_type=abstract

ASTROPHYSICS OF COMPACT OBJECTS: International Conference on Astrophysics of Compact Objects. AIP Conference Proceedings, Volum

Astronomy and Astrophysics

Astrophysics

1

Supernovae, Accretion And Accretion Disks, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Cataclysmic Binaries, Symbiotic Stars

Scientific paper

We have calculated the evolution of close binaries consisting of a white dwarf and a main-sequence or subgiant companion. We assume that, once Roche lobe overflow occurs a small fraction of the lost mass from the system forms a circumbinary disk, which extracts the orbital angular momentum from the system through tidal torques. Our calculations indicate that the existence of circumbinary disk can enhance the mass transfer rate so that the white dwarf can grow in mass efficiently to trigger type Ia supernovae even with relatively low-mass (<=2 Msolar) donor stars. This scenario suggest a new evolutionary channel to type Ia supernovae with delay times ~1-3 Gyr.

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