Statistics – Computation
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...373..604s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 373, June 1, 1991, p. 604-613. Research supported by Robert A. Welch Founda
Statistics
Computation
19
Electron Scattering, Energetic Particles, Radiative Transfer, Stellar Atmospheres, Stellar Interiors, Supernovae, Cobalt Isotopes, Local Thermodynamic Equilibrium, Nickel Isotopes, Opacity, Radioactive Decay, Space Plasmas
Scientific paper
Ionization equilibrium equations appropriate for supernova atmospheres are described. The solution of these equations indicate the high-energy particles associated with radioactive Ni-56 and Co-56 decay sustain a significant degree of ionization in the supernova plasma. Under certain physical conditions, the resulting electron scattering opacity can be many orders of magnitude greater than LTE estimates predict. A straightforward application of the present results to standard (diffusion approximation) hydrodynamic computations is proposed in which the non-LTE electron scattering opacity is expressed in terms of the local radioactive decay energy deposition rate and the mass density. Application to an analytic supernova dynamic evolution computation is presented to illustrate the results expected from more detailed calculations.
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