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Weak Interaction Processes in Core-Collapse Supernovae

Published online by Cambridge University Press:  19 September 2016

G. Martínez-Pinedo ,
K. Langanke ,
J.M. Sampaio ,
D.J. Dean ,
W.R. Hix ,
O.E.B. Messer ,
A. Mezzacappa ,
M. Liebendorfer ,
H.-Th. Janka  and
M. Rampp
G. Martínez-Pinedo
Affiliation:
Institut d’Estudis Espacials de Catalunya, Barcelona, Spain;[email protected] Institució Catalana de Recerca i Estudis Avançais, Barcelona, Spain
K. Langanke
Affiliation:
Institute for Physics and Astronomy, University of Århus, Denmark
J.M. Sampaio
Affiliation:
Institute for Physics and Astronomy, University of Århus, Denmark
D.J. Dean
Affiliation:
Physics Division, Oak Ridge National Laboratory, Tennessee, USA
W.R. Hix
Affiliation:
Physics Division, Oak Ridge National Laboratory, Tennessee, USA Department of Physics and Astronomy, University of Tennessee, USA Joint Institute for Heavy Ion research, Oak Ridge, Tennessee, USA
O.E.B. Messer
Affiliation:
Physics Division, Oak Ridge National Laboratory, Tennessee, USA Department of Physics and Astronomy, University of Tennessee, USA Joint Institute for Heavy Ion research, Oak Ridge, Tennessee, USA
A. Mezzacappa
Affiliation:
Physics Division, Oak Ridge National Laboratory, Tennessee, USA
M. Liebendorfer
Affiliation:
Physics Division, Oak Ridge National Laboratory, Tennessee, USA Department of Physics and Astronomy, University of Tennessee, USA Canadian Institute for Theoretical Astrophysics, Toronto, Ontario, Canada
H.-Th. Janka
Affiliation:
Max-Planck-Institut fur Astrophysik, Garching, Germany
M. Rampp
Affiliation:
Max-Planck-Institut fur Astrophysik, Garching, Germany

Summary

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Supernova simulations to date have assumed that during core collapse electron captures (EC) occur dominantly on free protons, while captures on heavy nuclei are Pauli-blocked and are ignored. Using microscopic calculations we show that the EC rates on heavy nuclei are large enough that, in contrast to previous assumptions, electron capture on nuclei dominates over capture on free protons. This leads to significant changes in core collapse simulations.

Type
Part IV Supernovae: Models
Information
International Astronomical Union Colloquium , Volume 192: Cosmic Explosions , 2005 , pp. 321 - 326
Copyright
Copyright © Springer-Verlag 2005

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