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Neutrinos from type-II supernovae and the neutrino-driven supernova mechanism

Abstract

Supernova 1987A has confirmed fundamental aspects of our theoretical view of type-II supernovae: Type-II supernovae are a consequence of the collapse of the iron core of a massive evolved star and lead to the formation of a neutron star or black hole. This picture is most strongly supported by the detection of electron antineutrinos in the IMB and Kamiokande II experiments in connection with SN 1987A. However, the mechanism causing the supernova explosion is not yet satisfactorily understood. In this paper the properties of the neutrino emission from supernovae and protoneutron stars will be reviewed; analytical estimates will be derived and results of numerical simulations will be shown. It will be demonstrated that the spectral distributions of the emitted neutrinos show clear and systematic discrepancies compared with thermal (black body-type) emission. This must be taken into account when neutrino observations from supernovae are to be interpreted, or when implications of the neutrino emission on nucleosynthesis processes in mantle and envelope of the progenitor star are to be investigated. Furthermore, the influence of neutrinos on the supernova dynamics will be discussed, in particular their crucial role in causing the explosion by Wilson`s neutrino-driven delayed mechanism. Possible implications of convection inside the  More>>
Authors:
Janka, H T [1] 
  1. Max-Planck-Institut fuer Astrophysik, Garching (Germany)
Publication Date:
Nov 01, 1996
Product Type:
Miscellaneous
Report Number:
PSI-PROC-96-03; CONF-9608192-
Reference Number:
SCA: 662430; PA: AIX-28:026738; EDB-97:046116; SN: 97001753650
Resource Relation:
Conference: Physics with neutrinos, Zuoz (Switzerland), 4-10 Aug 1996; Other Information: PBD: Nov 1996; Related Information: Is Part Of Proceedings of the summer school on physics with neutrinos; Locher, M.P. [ed.]; PB: 266 p.; PSI-Proceedings--96-03
Subject:
66 PHYSICS; SUPERNOVAE; NEUTRINOS; ANTINEUTRINOS; ASTROPHYSICS; BLACK HOLES; BLACKBODY RADIATION; COMPUTERIZED SIMULATION; MONTE CARLO METHOD; NEUTRON STARS; THEORETICAL DATA
OSTI ID:
444510
Country of Origin:
Switzerland
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1019-6447; Other: ON: DE97617666; TRN: CH9700120026738
Availability:
OSTI as DE97617666
Submitting Site:
CHN
Size:
pp. 79-108
Announcement Date:

Citation Formats

Janka, H T. Neutrinos from type-II supernovae and the neutrino-driven supernova mechanism. Switzerland: N. p., 1996. Web.
Janka, H T. Neutrinos from type-II supernovae and the neutrino-driven supernova mechanism. Switzerland.
Janka, H T. 1996. "Neutrinos from type-II supernovae and the neutrino-driven supernova mechanism." Switzerland.
@misc{etde_444510,
title = {Neutrinos from type-II supernovae and the neutrino-driven supernova mechanism}
author = {Janka, H T}
abstractNote = {Supernova 1987A has confirmed fundamental aspects of our theoretical view of type-II supernovae: Type-II supernovae are a consequence of the collapse of the iron core of a massive evolved star and lead to the formation of a neutron star or black hole. This picture is most strongly supported by the detection of electron antineutrinos in the IMB and Kamiokande II experiments in connection with SN 1987A. However, the mechanism causing the supernova explosion is not yet satisfactorily understood. In this paper the properties of the neutrino emission from supernovae and protoneutron stars will be reviewed; analytical estimates will be derived and results of numerical simulations will be shown. It will be demonstrated that the spectral distributions of the emitted neutrinos show clear and systematic discrepancies compared with thermal (black body-type) emission. This must be taken into account when neutrino observations from supernovae are to be interpreted, or when implications of the neutrino emission on nucleosynthesis processes in mantle and envelope of the progenitor star are to be investigated. Furthermore, the influence of neutrinos on the supernova dynamics will be discussed, in particular their crucial role in causing the explosion by Wilson`s neutrino-driven delayed mechanism. Possible implications of convection inside the newly born neutron star and between surface and the supernova shock will be addressed and results of multi-dimensional simulations will be presented. (author) 7 figs., 1 tab., refs.}
place = {Switzerland}
year = {1996}
month = {Nov}
}