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35 - The interplay between nuclear electron capture and fluid dynamics in core collapse supernovae

Published online by Cambridge University Press:  11 August 2009

W. R. Hix
Affiliation:
Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 USA Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
O. E. B. Messer
Affiliation:
Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 Center for Astrophysical Thermonuclear Flashes, University of Chicago, Chicago, IL 60637 Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
A. Mezzacappa
Affiliation:
Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
Peter Höflich
Affiliation:
University of Texas, Austin
Pawan Kumar
Affiliation:
University of Texas, Austin
J. Craig Wheeler
Affiliation:
University of Texas, Austin
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Summary

Abstract

As we investigate the manifestly multi-dimensional nature of core collapse supernovae, the connection between microscopic physics and macroscopic fluid motion must not be forgotten. As an example, we discuss nuclear electron capture and its impact on the supernova shock. Though electron capture on nuclei with masses larger than 60 is the most important nuclear interaction to the dynamics of stellar core collapse, in prior simulations of core collapse it has been treated in a highly parameterized fashion, if not ignored. With a realistic treatment of electron capture on heavy nuclei come significant changes in the hydrodynamics of core collapse and bounce. We discuss these as well as their ramifications for the post-bounce evolution in core collapse supernovae.

Introduction

The many observations of asymmetries in core collapse supernovae, coupled with the failure of spherically symmetric simulations of the neutrino reheating paradigm to produce explosions, has persuaded the community that multidimensional effects like convection and other fluid instabilities must be vital elements of the supernova mechanism (Wilson & Mayle 1993, Herant et al. 1994, Burrows et al. 1995, Fryer & Warren 2002) though, even with these convective enhancements, explosions are not guaranteed (Janka & Müller 1996, Mezzacappa et al. 1998, Buras et al. 2003). This view has been reinforced in recent years by the failure of more accurate spherically symmetric multigroup Boltzmann simulations to produce explosions (Rampp & Janka 2000, Mezzacappa et al. 2001, Liebendörfer et al. 2001, Thompson et al. 2003).

Type
Chapter
Information
Cosmic Explosions in Three Dimensions
Asymmetries in Supernovae and Gamma-Ray Bursts
, pp. 307 - 314
Publisher: Cambridge University Press
Print publication year: 2004

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References

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  • The interplay between nuclear electron capture and fluid dynamics in core collapse supernovae
    • By W. R. Hix, Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 USA Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA, O. E. B. Messer, Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 Center for Astrophysical Thermonuclear Flashes, University of Chicago, Chicago, IL 60637 Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA, A. Mezzacappa, Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
  • Edited by Peter Höflich, University of Texas, Austin, Pawan Kumar, University of Texas, Austin, J. Craig Wheeler, University of Texas, Austin
  • Book: Cosmic Explosions in Three Dimensions
  • Online publication: 11 August 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536236.035
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  • The interplay between nuclear electron capture and fluid dynamics in core collapse supernovae
    • By W. R. Hix, Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 USA Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA, O. E. B. Messer, Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 Center for Astrophysical Thermonuclear Flashes, University of Chicago, Chicago, IL 60637 Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA, A. Mezzacappa, Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
  • Edited by Peter Höflich, University of Texas, Austin, Pawan Kumar, University of Texas, Austin, J. Craig Wheeler, University of Texas, Austin
  • Book: Cosmic Explosions in Three Dimensions
  • Online publication: 11 August 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536236.035
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • The interplay between nuclear electron capture and fluid dynamics in core collapse supernovae
    • By W. R. Hix, Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 USA Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA, O. E. B. Messer, Department of Astronomy and Astrophysics, University of Chicago, Chicago, IL 60637 Center for Astrophysical Thermonuclear Flashes, University of Chicago, Chicago, IL 60637 Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA, A. Mezzacappa, Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
  • Edited by Peter Höflich, University of Texas, Austin, Pawan Kumar, University of Texas, Austin, J. Craig Wheeler, University of Texas, Austin
  • Book: Cosmic Explosions in Three Dimensions
  • Online publication: 11 August 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536236.035
Available formats
×