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Origin of Cosmic Magnetic Fields

  • Peter L. Biermann
  • Cristina F. Galea
Conference paper
Part of the NATO Science Series book series (NAII, volume 130)

Abstract

We propose that the overlapping shock fronts from young supernova remnants produce a locally unsteady, but globally steady large scale spiral shock front in spiral galaxies, where star formation and therefore massive star explosions correlate geometrically with spiral structure. This global shock front with its steep gradients in temperature, pressure and associated electric fields will produce drifts, which in turn give rise to a strong sheet-like electric current, we propose. This sheet current then produces a large scale magnetic field, which is regular, and connected to the overall spiral structure. This rejuvenates the overall magnetic field continuously, and also allows to understand that there is a regular field at all in disk galaxies. This proposal connects the existence of magnetic fields to accretion in disks. We not yet address all the symmetries of the magnetic field here; the picture proposed here is not complete. X-ray observations may be able to test it already.

Keywords

Magnetic Field Sheet Current Star Formation Accretion Disk Spiral Galaxy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • Peter L. Biermann
    • 1
    • 2
  • Cristina F. Galea
    • 3
  1. 1.Max-Planck Institute for RadioastronomyBonnGermany
  2. 2.Department of Physics and AstronomyUniversity of BonnBonnGermany
  3. 3.Experimental High Energy Physics DepartmentUniversity of NijmegenNijmegenThe Netherlands

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