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Supernovae, Gamma-Ray Bursts and Stellar Rotation

Published online by Cambridge University Press:  26 May 2016

S. E. Woosley  and
A. Heger
S. E. Woosley
Affiliation:
Department of Astronomy and Astrophysics, UCSC, Santa Cruz CA 95064, USA
A. Heger
Affiliation:
Department of Astronomy and Astrophysics, Enrico Fermi Institute, The University of Chicago, 5640 S. Ellis Avenue, Chicago IL 60637, USA

Abstract

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One of the most dramatic possible consequences of stellar rotation is its influence on stellar death, particularly of massive stars. If the angular momentum of the iron core when it collapses is such as to produce a neutron star with a period of 5 ms or less, rotation will have important consequences for the supernova explosion mechanism. Still shorter periods, corresponding to a neutron star rotating at break up, are required for the progenitors of gamma-ray bursts (GRBs). Current stellar models, while providing an excess of angular momentum to pulsars, still fall short of what is needed to make GRBs. The possibility of slowing young neutron stars in ordinary supernovae by a combination of neutrino-powered winds and the propeller mechanism is discussed. The fall back of slowly moving ejecta during the first day of the supernova may be critical. GRBs, on the other hand, probably require stellar mergers for their production and perhaps less efficient mass loss and magnetic torques than estimated thus far.

Type
Session 5 Final Stages, Nucleosynthesis
Information
Symposium - International Astronomical Union , Volume 215: Stellar Rotation , 2004 , pp. 601 - 612
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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