Three-dimensional Simulations of the Explosion of Type Ia Supernovae

Details Three-dimensional Simulations of the Explosion of Type Ia Supernovae Three-dimensional Simulations of the Explosion of Type Ia Supernovae

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21534301m&link_type=abstract

American Astronomical Society, AAS Meeting #215, #343.01; Bulletin of the American Astronomical Society, Vol. 42, p.448

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Using the newly developed three-dimensional, adaptive mesh code CASTRO, we simulate the deflagration phase of a Type Ia supernova that has been ignited slightly off-center. The code has been adapted for the problem by including self gravity and an appropriate equation of state. Nuclear burning is included using a "thickened flame" model and the effect of choosing various speeds for the local flame speed in the range 50 - 200 km/s is explored. Properties of the ash are determined off-line using a large reaction network and the evolution of ash that is in nuclear statistical equilibrium is followed through the expansion using tables. The explosion is followed to the first break out of the burning at the white dwarf surface. As with other studies, we find that this initial deflagration is too weak to produce a supernova like what is seen. Subsequent detonation will be necessary if the model is to work. Future plans along these lines will be discussed.
This work has been supported by the DOE SciDAC Program under grant DE FC02 06ER41438 and by NASA (NNX09AK36G). Calculations were carried out at the NERSC computing facility on Franklin and, at UCSC, on the Pleiades computer.

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