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Neutrinos from type II supernovae - The first 100 millisecondsThe collapse of a 1.17 solar mass iron core is numerically followed through infall to 100 ms past core bounce, and the emergent neutrino spectra during each phase are highlighted. It is found that, even with fairly optimistic conditions for producing a strong, sustained core-bounce shock wave, the prompt shock stalls within 9 ms of core bounce at a radius of less than 250 km. It appears that a radical change in the character of the progenitor core or in our understanding of the relevant physics of stellar collapse is needed before the direct mechanism for type II supernovae can become viable. Expanding the number of neutrino types from one to six magnifies the debilitating effect of neutrino loss on shock propagation. At shock breakout, prompt bursts of all neutrino types are observed. The luminosities of the nonelectron types show a sudden turn-on in luminosity while that of the electron neutrinos steadily increases throughout infall as a result of accelerating electron capture.
Document ID
19910031853
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Myra, Eric S.
(Virginia, University Charlottesville, United States)
Burrows, Adam
(Arizona, University Tucson, United States)
Date Acquired
August 15, 2013
Publication Date
November 20, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 364
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
91A16476
Funding Number(s)
CONTRACT_GRANT: NSF AST-87-14176
CONTRACT_GRANT: NAGW-2145
CONTRACT_GRANT: NSF AST-89-14346
Distribution Limits
Public
Copyright
Other

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