Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...234..597c&link_type=abstract
Astrophysical Journal, Part 1, vol. 234, Dec. 1, 1979, p. 597-608.
Astronomy and Astrophysics
Astrophysics
23
Nonequilibrium Conditions, Shock Wave Propagation, Stellar Evolution, Stellar Models, Supernovae, Isotropic Media, Magnetohydrodynamic Flow, Photosphere, Velocity Distribution, Viscosity, X Ray Sources
Scientific paper
The paper presents an investigation of the emergence of the shock wave from the envelope of a type II supernova in the approximation of gray radiative transfer. It is found that inclusion of flux-limiting does not play a large role in the radiative energy equation, while it is important in the momentum equation. The reduced radiative flux with a flux limiter reduces the momentum coupling between the radiation and the gas, and permits a transition from a radiation-dominated to a viscous shock wave as the shock moves into optically thin layers of the star. After the completion of the hydrodynamic calculation, the emergent spectrum of the supernova at selected times was computed by solving the nongray time-independent radiative transfer equation on the assumption of coherent isotropic scattering and an LTE nonscattering source function.
Chevalier Roger A.
Klein Richard I.
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