Astrophysics and Space Science

, Volume 207, Issue 1, pp 109–117 | Cite as

Fast galactic dynamos and interstellar magnetic bubbles

  • J. P. Vallée


Large ( > 100 pc) interstellar magnetic bubbles are necessary in the cosmic-ray-driven fast galactic dynamo, as pioneered by Parker in 1992. In a first part, a look is made at the available data on nearby (< 1000 pc) large interstellar magnetic bubbles. Here the magnetic field strengthB in a large shell of densityn around an OB association is found to be a few times greater than that outside in the general interstellar medium, varying typically likeB ~n, as expected for a shocked medium. In a second part, some tests are made of the predictions about interstellar magnetic bubbles made by the theory of a cosmic-ray driven fast galactic dynamo. The bubble tests generally support the idea of a cosmic-ray-driven fast galactic dynamo for the Milky Way.


Magnetic Field Interstellar Medium Large Shell Magnetic Bubble Bubble Test 
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

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • J. P. Vallée
    • 1
  1. 1.JCMT Group, Herzberg Institute of AstrophysicsNational Research Council of CanadaOttawaCanada

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