Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-09-25
J.Phys.Conf.Ser.46:413-417,2006
Astronomy and Astrophysics
Astrophysics
5 pages, 3 figures, in: Proceedings of the SciDAC 2006 Meeting, Denver June 25-26 2006, also available at http://herald.iop.
Scientific paper
10.1088/1742-6596/46/1/057
We explore the evolution of thermonuclear supernova explosions when the progenitor white dwarf star ignites asymmetrically off-center. Several numerical simulations are carried out in two and three dimensions to test the consequences of different initial flame configurations such as spherical bubbles displaced from the center, more complex deformed configurations, and teardrop-shaped ignitions. The burning bubbles float towards the surface while releasing energy due to the nuclear reactions. If the energy release is too small to gravitationally unbind the star, the ash sweeps around it, once the burning bubble approaches the surface. Collisions in the fuel on the opposite side increase its temperature and density and may -- in some cases -- initiate a detonation wave which will then propagate inward burning the core of the star and leading to a strong explosion. However, for initial setups in two dimensions that seem realistic from pre-ignition evolution, as well as for all three-dimensional simulations the collimation of the surface material is found to be too weak to trigger a detonation.
Roepke Friedrich Konrad
Woosley Stan E.
No associations
LandOfFree
Surface detonation in type Ia supernova explosions? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Surface detonation in type Ia supernova explosions?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface detonation in type Ia supernova explosions? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-260259