3 research outputs found
Instabilities and Mixing in SN 1993J
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.Comment: 20 pages, LaTeX (AASTeX), to appear in Ap