Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924221j&link_type=abstract
American Astronomical Society, AAS Meeting #219, #242.21
Astronomy and Astrophysics
Astronomy
Scientific paper
Despite their use as standardizable candles that led to the (Nobel-prize winning) discovery of the accelerating Universe, we still do not understand the mechanism by which type Ia supernovae explode. Some of the most successful proposed scenarios involve a centrally-ignited deflagration of a massive C-O white dwarf. Due to vigorous convection prior to ignition and the subsequent fluid instabilities that develop, the details of turbulent combustion are critically important to capture the evolution of the explosion. The relatively slow and extremely non-linear progression of the deflagration phase provides a link between expected ignition conditions and gross properties of the supernova. In order to provide a physical understanding of how variations in the properties of the white dwarf (or host galaxy) affect the explosion outcome, numerical investigations must be performed in 3D with a detailed treatment of turbulence-flame interaction (TFI). We present initial results from incorporating a new treatment of TFI in 3D simulations of type Ia supernovae.
This work was supported in part by NASA under grant No. NNX09AD19G. The author's present address is at the Naval Research Laboratory.
Calder Alan C.
Jackson Aaron P.
Townsley Dean M.
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