Instabilities and Mixing in SN 1993J
Abstract
Rayleigh-Taylor (R-T) instabilities in the explosion of SN 1993J are investigated by means of two-dimensional hydrodynamical simulations. It is found that the extent of mixing is sensitive to the progenitor's core mass and the envelope mass. Because the helium core mass (3 - 4 \ms) is smaller than that of SN 1987A, R-T instabilities at the He/C+O interfaces develop to induce a large scale mixing in the helium core, while the instability is relatively weak at the H/He interface due to the small envelope mass. The predicted abundance distribution, in particular the amount of the \ni~ mixing, is compared with those required in the theoretical light curves and the late time optical spectra. This enables us to specify the progenitor of SN 1993J in some detail.
Keywords
Cite
@article{arxiv.astro-ph/9701083,
title = {Instabilities and Mixing in SN 1993J},
author = {K. Iwamoto and T. R. Young and N. Nakasato and T. Shigeyama and K. Nomoto and I. Hachisu and H. Saio},
journal= {arXiv preprint arXiv:astro-ph/9701083},
year = {2009}
}
Comments
20 pages, LaTeX (AASTeX), to appear in ApJ