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Collapsing Stellar Cores and Supernovae

Epstein, R. I. and Nørgaard, H. and Bond, J. R. (1979) Collapsing Stellar Cores and Supernovae. Astronomy and Astrophysics, 74 (3). pp. 353-360. ISSN 0004-6361.

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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 E_(cm); 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 E_(cm) can be large enough to yield a supernova event.

Item Type:Article
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URLURL TypeDescription
Bond, J. R.0000-0003-2358-9949
Additional Information:© 1979 European Southern Observatory. Provided by the NASA Astrophysics Data System. Received April 21, 1978. We gladly acknowledge the stimulating and useful discussions we have had with Gordon Baym; Ted Mazurek, Dave Arnett, Demos Kazanas and Ken Van Riper. This work was supported in part by NSF Grants PHY 76-83685 and AST 76-21707. HN also gratefully acknowledges the support of the Danish Natural Science Research Council.
Funding AgencyGrant Number
NSFPHY 76-83685
NSFAST 76-21707
Danish Natural Science Research CouncilUNSPECIFIED
Subject Keywords:Supernovae; stellar evolution
Issue or Number:3
Record Number:CaltechAUTHORS:20130716-082240964
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39383
Deposited On:16 Jul 2013 16:03
Last Modified:30 Oct 2020 22:13

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