Numerical Simulations of Carbon Ignition in Type Ia Supernovae

Details Numerical Simulations of Carbon Ignition in Type Ia Supernovae Numerical Simulations of Carbon Ignition in Type Ia Supernovae

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20920003m&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #200.03; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

When and how the type Ia supernovae ignite is a crucial parameter for the study of the following burning process, subsonic deflagration and maybe a later transition to supersonic detonation. Using 2D grid-based anelastic codes, we investigated numerically the convective flow property in the convective core of a Chandrasekhar mass white dwarf just one minute before it explodes to determine the location of ignition sparks and their distributions. We found the convective flow shows a clearly dipole feature, and the dipole axis flips around. First sparks take place around 100 km away from center. This work has been supported by the NSF (AST 02-06111), NASA (NAG5-12036), and the DOE Program for Scientific Discovery through Advanced Computing (SciDAC) under grant DEFC02-01ER41176.

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