Chapter 6. Magnetic Fields in Astrophysics

  1. Prof. Steven N. Shore

Published Online: 7 FEB 2008

DOI: 10.1002/9783527619054.ch6

Astrophysical Hydrodynamics: An Introduction, Second Edition

Astrophysical Hydrodynamics: An Introduction, Second Edition

How to Cite

Shore, S. N. (2007) Magnetic Fields in Astrophysics, in Astrophysical Hydrodynamics: An Introduction, Second Edition, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany. doi: 10.1002/9783527619054.ch6

Author Information

  1. Dipartimento di Fisica ‘Enrico Fermi’, Università di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy

Publication History

  1. Published Online: 7 FEB 2008
  2. Published Print: 18 JUL 2007

ISBN Information

Print ISBN: 9783527406692

Online ISBN: 9783527619054

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Keywords:

  • astrophysical hydrodynamics;
  • magnetic fields;
  • astrophysics;
  • basic equations;
  • Alfvén waves;
  • magnetic equilibrium;
  • Pinch equilibrium;
  • force-free fields;
  • magnetic helicity;
  • magnetic dynamos;
  • magnetic reconnection;
  • Rikitake's toy phenomenological model

Summary

This chapter contains sections titled:

  • Historical Introduction

  • The Basic Equations

    • Diffusion

    • Flux Freezing

    • Ambipolar Diffusion

  • Alfvén Waves

  • Magnetic Equilibrium: Pinch Equilibrium as an Example

    • Flux Conservation and Stellar Magnetism

  • Force-Free Fields

  • Magnetic Helicity and Its Vorticity Analogy

  • Magnetic Dynamos

    • Cowling's “Antidynamo” Theorem

    • A First-Pass Phenomenological Dynamo Model

    • Building Dynamos: Differential Rotation and Turbulence

    • The Dynamo Number and Scaling Relations

    • The Basic α − ω, Dynamo

    • Some Examples of Dynamo Fields

  • Magnetic Reconnection

  • Appendix: Rikitake's Toy Phenomenological Model