Rotating Type Ia SN progenitors: explosion and light curves

Details Rotating Type Ia SN progenitors: explosion and light curves Rotating Type Ia SN progenitors: explosion and light curves

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..797..497d&link_type=abstract

INTERACTING BINARIES: Accretion, Evolution, and Outcomes. AIP Conference Proceedings, Volume 797, pp. 497-503 (2005).

Physics

Nuclear Physics

1

Supernovae, Nucleosynthesis, White Dwarfs, Accretion, Supernovae, Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments, Nuclear Physics Aspects Of Novae, Supernovae, And Other Explosive Environments, Faint Blue Stars, White Dwarfs, Degenerate Stars, Nuclei Of Planetary Nebulae, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages

Scientific paper

High redshift SNe Ia have been recently used to calibrate the cosmological distance scale and to infer the existence of the dark energy. The reliability of such a method depends on the effective knowledge of the absolute brightness of this class of supernovae. This would require a complete understanding of the physics of SNeIa.
Starting from an accreting rotating white dwarf, the only progenitor that we found to be able to grow till the Chandrasekhar mass and undergo a thermonuclear explosion, we simulate the explosion, deriving the nucleosynthesis and the light curve. We explore the final outcome in the framework of a 1D delayed detonation model, where the characteristic density for which the transition from deflagration to detonation takes place is a free parameter.
Although preliminary, our results imply that rotating white dwarfs produce a range of explosive conditions, characterized by different ignition densities and total masses. Maximum luminosities of successfully explosive models differ up to 0.11 mag. In a few cases, the formation of a small highly neutronised remnant is found.

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