Type IA supernovae : theoretical light curves for SN 1972E and SN 1981B.
Abstract
Based on delayed detonation models of Khokhlov (1991a,b) theoretical light curves have been calculated, which accurately reproduce the observed light curves of the Type Ia supernovae SN 1972E and SN 1981B. Our models describe very well both the pre-maximum rise and the post-maximum decline of the light curve and also give the correct maximum luminosity. The theoretical light curves are calculated using (i) a detailed equation of state with an elaborate treatment of the ionization balance, (ii) an implicit LTE radiation transport scheme based on a modified diffusion approximation with space and time dependent correction factors determined by the exact solution of the radiation transport equation at low optical depths (τ <~ 100), (iii) tabulated time- dependent expansion opacities which take into account the composition structure of the initial model,(iv) a Monte Carlo γ-ray deposition scheme, and (v) homologous expansion to evolve the structure of the models.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 1991
- Bibcode:
- 1991A&A...248L...7H
- Keywords:
-
- Light Curve;
- Supernova Remnants;
- Supernovae;
- Ubv Spectra;
- Stellar Evolution;
- Stellar Luminosity;
- Stellar Models;
- Astrophysics