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Collapsing stellar cores and supernovae

Journal Article:

Abstract

The evolution of a stellar core is studied during its final quasi-hydrostatic contraction. The core structure and the (poorly known) properties of neutron rich matter are parametrized to include most plausible cases. It is found that the density-temperature trajectory of the material in the central part of the core (the core-center) is insensitive to nearly all reasonable parameter variations. The central density at the onset of the dynamic phase of the collapse (when the core-center begins to fall away from the rest of the star) and the fraction of the emitted neutrinos which are trapped in the collapsing core-center depend quite sensitively on the properties of neutron rich matter. We estimate that the amount of energy Ecm which is imparted to the core-mantle by the neutrinos which escape from the imploded core-center can span a large range of values. For plausible choices of nuclear and model parameters Ecm can be large enough to yield a supernova event.
Authors:
Epstein, R J; [1]  Noorgaard, H; [1]  Chicago Univ., IL (USA). Enrico Fermi Inst.); Bond, J R; [2]  California Inst. of Tech., Pasadena (USA). W.K. Kellogg Radiation Lab.)
  1. Nordisk Inst. for Teoretisk Atomfysik, Copenhagen (Denmark)
  2. Niels Bohr Institutet, Copenhagen (Denmark)
Publication Date:
May 01, 1979
Product Type:
Journal Article
Reference Number:
AIX-10-475251; EDB-80-007357
Resource Relation:
Journal Name: Astron. Astrophys.; (Germany, Federal Republic of); Journal Volume: 74:3
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; STAR MODELS; GRAVITATIONAL COLLAPSE; STAR EVOLUTION; SUPERNOVAE; NEUTRINOS; NUCLEAR MATTER; ELEMENTARY PARTICLES; ERUPTIVE VARIABLE STARS; FERMIONS; LEPTONS; MASSLESS PARTICLES; MATHEMATICAL MODELS; MATTER; STARS; VARIABLE STARS; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
OSTI ID:
5756197
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: AAEJA
Submitting Site:
INIS
Size:
Pages: 353-360
Announcement Date:

Journal Article:

Citation Formats

Epstein, R J, Noorgaard, H, Chicago Univ., IL (USA). Enrico Fermi Inst.), Bond, J R, and California Inst. of Tech., Pasadena (USA). W.K. Kellogg Radiation Lab.). Collapsing stellar cores and supernovae. Germany: N. p., 1979. Web.
Epstein, R J, Noorgaard, H, Chicago Univ., IL (USA). Enrico Fermi Inst.), Bond, J R, & California Inst. of Tech., Pasadena (USA). W.K. Kellogg Radiation Lab.). Collapsing stellar cores and supernovae. Germany.
Epstein, R J, Noorgaard, H, Chicago Univ., IL (USA). Enrico Fermi Inst.), Bond, J R, and California Inst. of Tech., Pasadena (USA). W.K. Kellogg Radiation Lab.). 1979. "Collapsing stellar cores and supernovae." Germany.
@misc{etde_5756197,
title = {Collapsing stellar cores and supernovae}
author = {Epstein, R J, Noorgaard, H, Chicago Univ., IL (USA). Enrico Fermi Inst.), Bond, J R, and California Inst. of Tech., Pasadena (USA). W.K. Kellogg Radiation Lab.)}
abstractNote = {The evolution of a stellar core is studied during its final quasi-hydrostatic contraction. The core structure and the (poorly known) properties of neutron rich matter are parametrized to include most plausible cases. It is found that the density-temperature trajectory of the material in the central part of the core (the core-center) is insensitive to nearly all reasonable parameter variations. The central density at the onset of the dynamic phase of the collapse (when the core-center begins to fall away from the rest of the star) and the fraction of the emitted neutrinos which are trapped in the collapsing core-center depend quite sensitively on the properties of neutron rich matter. We estimate that the amount of energy Ecm which is imparted to the core-mantle by the neutrinos which escape from the imploded core-center can span a large range of values. For plausible choices of nuclear and model parameters Ecm can be large enough to yield a supernova event.}
journal = {Astron. Astrophys.; (Germany, Federal Republic of)}
volume = {74:3}
journal type = {AC}
place = {Germany}
year = {1979}
month = {May}
}