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The effect of neutrino transport on the collapse of iron stellar coresA multigroup flux-limited diffusion approximation to neutrino transport, correct to first order in material velocities, is described. The role of neutrino-electron scattering in determining core deleptonization is studied using a modified Fokker-Planck approximation in which adjacent neutrino energy groups are coupled. The moderate deleptonizaton obtained during infall restricts homologous core masses to less than 0.8 solar mass. With 0.6-0.8 solar mass of outer core to traverse, nuclear dissociation alone stalls the shock waves produced at core bounce. In addition, neutrino energy losses remove at least another 4 x 10 to the 51st ergs. In no case is matter ejected promptly as a direct result of the initial shock wave.
Document ID
19870059549
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Myra, E. S.
(Pennsylvania Univ. Philadelphia, PA, United States)
Bludman, S. A.
(Pennsylvania Univ. Philadelphia, PA, United States)
Hoffman, Y.
(Pennsylvania, University Philadelphia, United States)
Lichtenstadt, I.
(Jerusalem, Hebrew University Israel)
Sack, N.
(Jerusalem, Hebrew University Israel; Pennsylvania, University, Philadelphia, United States)
Date Acquired
August 13, 2013
Publication Date
July 15, 1987
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 318
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A46823
Funding Number(s)
CONTRACT_GRANT: NSF PHY-82-17853
CONTRACT_GRANT: EY-76-C-02-3071
Distribution Limits
Public
Copyright
Other

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