2002/08/27 by Cristian R. Ghezzi, E. M. de Gouveia Dal Pino, Ghezzi, Cristian R. +4
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #Gamma-ray bursts and supernovae #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0208483
8 pages, 2 figures, Proc. of "Frontiers of the Universe", 17th - 23rd June 2001, XIII Rencontres de Blois
arxiv created 2002/08/27 · openalex publication_date 2002/08/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The burning speed of a thermonuclear supernova front could be described by the fractal model of combustion. We have examined the effects of magnetic fields on the fractalization of the front considering a white dwarf with a nearly dipolar magnetic field and found an intrinsic asymmetry on the velocity field of the expanding plasma. For white dwarf's magnetic fields of 108-109 G at the surface, and assuming a field roughly 10 times greater near the center, we have found asymmetries in the velocity field > 10-20 % at rho ~ 108 g cm^(-3), produced between the magnetic polar and the equatorial axis of the remnant. This effect may be related to the asphericities inferred from spectro-polarimetric observations of very young SN Ia remnants (for example: SN 1999by). In the present work, we analyse the dependence of the asymmetry with the composition of the white dwarf progenitor.