Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.7601b&link_type=abstract
American Astronomical Society, 181st AAS Meeting, #76.01; Bulletin of the American Astronomical Society, Vol. 24, p.1243
Astronomy and Astrophysics
Astronomy
Scientific paper
We present two-dimensional calculations of detonations in degenerate carbon-oxygen material to investigate detonation models of Type Ia supernovae. Using a numerical hydrocode based on the flux-corrected transport algorithm (FCT), and that incorporates nuclear burning, we investigate the multidimensional effects of perturbations in the background material on the propagation of a Chapman-Jouget detonation. Past one-dimensional calculations of detonation models have shown that detonations, once initiated in the white dwarf core, propagate through virtually the entire star, burning almost all of the matter to iron-group elements, which is in disagreement with observations. We look at detonations propagating through a range of background densities, varying the nature of the density perturbation in the background material. We investigate the possibility that a detonation, once initiated in a carbon-oxygen degenerate core, might be quenched due to multidimensional effects at higher densities than predicted in one-dimensional calculations. Thus, detonation models could allow for the presence of a substantial amount of intermediate-mass elements.
Boisseau John Richelieu
Oran Elaine
Wheeler Justin C.
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