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The origin of magnetic fields in elliptical galaxies

Lookup NU author(s): Professor Anvar ShukurovORCiD

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Abstract

We argue that interstellar gas in elliptical galaxies can be turbulent, with turbulent scale and velocity of 400 pc and 20 km s(-1) respectively. An upper limit on turbulent velocity, similar or equal to 50 km s(-1), follows from the requirement that the turbulence dissipation rate does not exceed the X-ray gas luminosity. The turbulence can generate random magnetic fields of 0.3 muG strength at the above scale via fluctuation dynamo action. The resulting Faraday rotation is random, with a typical value of 5-30 rad m(-2), consistent with observational evidence available.

Publication metadata

Author(s): Shukurov A

Publication type: Article

Publication status: Published

Journal: Highlights of Astronomy

Year: 2002

Volume: 12

Pages: 731-732

Print publication date: 01/01/2002

ISSN (print):

ISSN (electronic):

Publisher: Cambridge University Press

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