The origin of large scale magnetic fields in galaxies.

Details The origin of large scale magnetic fields in galaxies. The origin of large scale magnetic fields in galaxies.

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995basi...23..481s&link_type=abstract

Bulletin of the Astronomical Society of India, Vol. 23, No. 4, p. 481 - 488

Mathematics

Logic

5

Magnetic Fields: Galaxies, Magnetic Fields: Origin, Galactic Dynamo, Turbulence, Magnetic Fields

Scientific paper

Magnetic fields correlated on several kiloparsec scales are seen in spiral galaxies. Their origin could be due to the winding up of a primordial cosmological field or due to amplification of a small seed field by a turbulent galactic dynamo. Both these options have difficulties. There is no known mechanism for producing the required primordial field. At the same time the turbulent dynamo may self-destruct before being able to produce the large scale field, due to excess of small scale power. The current status of these difficulties is discussed.

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