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Title:
Stellar core collapse - Numerical model and infall epoch
Authors:
Bruenn, S. W.
Affiliation:
AA(Florida Atlantic University, Boca Raton)
Publication:
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 58, Aug. 1985, p. 771-841. (ApJS Homepage)
Publication Date:
08/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Gravitational Collapse, Stellar Cores, Stellar Models, Computational Astrophysics, Density Distribution, Entropy, Equations Of State, Hydrodynamic Equations, Neutrinos, Particle Interactions, Radiation Transport
DOI:
10.1086/191056
Bibliographic Code:
1985ApJS...58..771B

Abstract

The core infall stage of the final evolution of a ten solar mass star is studied using an accurate and detailed numerical model. The features of the model include a realistic initial model and equation of state, general relativistic hydrodynamics, independent treatment of neutrino pairs, multigroup flux-limited diffusion, direct solution of the electron scattering and thermal production terms, evaluation of exact neutrino interaction expressions, and a consistent treatment of the effects of matter compression and expansion on the neutrinos, including the transparent cutoff. Deleptonization occuring during the collapse is carefully examined, and a detailed comparison is made between the numerical results for the collapse and shock propagation phases and the conceptual framework.

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