Deflagration to Detonation
Abstract
Thermonuclear explosions of Type Ia supernovae (SNIa) involve turbulent deflagrations, detonations, and possibly a deflagration-to-detonation transition. A phenomenological delayed detonation model of SNIa successfully explains many observational properties of SNIa including monochromatic light curves, spectra, brightness - decline and color - decline relations. Observed variations among SNia are explained as a result of varying nickel mass synthesised in an explosion of a Chandrasekhar mass C/O white dwarf. Based on theoretical models of SNIa, the value of the Hubble constant H_o \simeq 67km/s/Mpc was determined without the use of secondary distance indicators. The cause for the nickel mass variations in SNIa is still debated. It may be a variation of the initial C/O ratio in a supernova progenitor, rotation, or other effects.
Cite
@article{arxiv.astro-ph/9910454,
title = {Deflagration to Detonation},
author = {A. M. Khokhlov},
journal= {arXiv preprint arXiv:astro-ph/9910454},
year = {2009}
}
Comments
11 pages, TeX, epsf.sty, 4 figures(1color), to be published in: Supernovae and Gamma-Ray Bursts, eds. M.Livio, K.Sahu, N.Panagia (Cambridge:University Press)