Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...512..827g&link_type=abstract
The Astrophysical Journal, Volume 512, Issue 2, pp. 827-842.
Astronomy and Astrophysics
Astronomy
27
Hydrodynamics, Instabilities, Nuclear Reactions, Nucleosynthesis, Abundances, Shock Waves, Stars: Supernovae: General, Stars: White Dwarfs
Scientific paper
This work presents the results of a numerical study of two-dimensional cellular thermonuclear detonations in degenerate C+O matter at densities 10^6-3x10^7 g cm^-3. We found three levels of detonation cells of very different sizes which correspond to the C-, O-, and Si-reaction length scales. The Si cells are comparable to or even larger than the white dwarf size at densities below 10^7 g cm^-3. In the presence of the cellular structures, the averaged half-reaction length compared to the one-dimensional case increases by the factor of 1.3 for the Si-reaction, and by a factor of 1.6 for the O- and C-reactions. The formation of unreacted pockets and overreacted regions behind the cellular detonation front creates concentration fluctuations in the reaction zone. The composition fluctuations and the reaction length increase may affect the spectra of Type Ia supernovae predicted by delayed-detonation models.
Gamezo Vadim N.
Khokhlov Alexei M.
Oran Elaine S.
Wheeler Justin C.
No associations
LandOfFree
Multilevel Structure of Cellular Detonations in Type IA Supernovae 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 Multilevel Structure of Cellular Detonations in Type IA Supernovae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multilevel Structure of Cellular Detonations in Type IA Supernovae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1028387