Non-equilibrium radiative transfer in supernova theory : models of linear type II supernovae.

Abstract

We present hydrodynamic computations of light curves of linear type II supernovae (SNe II-L) accounting for multi-frequency-group time-dependent radiation transfer. We briefly discuss the computation method which involves implicit hydrodynamics coupled to radiation. The equation of state and the absorption coefficient including the Lyman jump describe ionization balance without the assumption of equilibrium between matter and radiation. Our set of hydrodynamical models shows that the observations of weak SNe II-L are well described by the explosion of a supergiant presupernova with a radius ∼ 600 R ○ . and with a small hydrogen envelope mass ∼ 1 − 2 M ○ .. We pay special attention to the exceptionally bight Supernova 1979C