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The magnetic field of the Large Magellanic Cloud revealed through Faraday rotation

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arxiv astro-ph/0503226 v1 pith:IHLCFOGD submitted 2005-03-09 astro-ph

The magnetic field of the Large Magellanic Cloud revealed through Faraday rotation

B. M. Gaensler (1 , 2) , M. Haverkorn (1) , L. Staveley-Smith (3) , J. M. Dickey (4) , N. M. McClure-Griffiths (3) , J. R. Dickel (5) , M. Wolleben (6) ((1) Harvard Smithsonian CfA
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(2) U Sydney (3) ATNF (4) U Tasmania (5) UIUC (6) MPIfR)
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We have measured the Faraday rotation toward a large sample of polarized radio sources behind the Large Magellanic Cloud (LMC), to determine the structure of this galaxy's magnetic field. The magnetic field of the LMC consists of a coherent axisymmetric spiral of field strength ~1 microgauss. Strong fluctuations in the magnetic field are also seen, on small (<0.5 parsecs) and large (~100 parsecs) scales. The significant bursts of recent star formation and supernova activity in the LMC argue against standard dynamo theory, adding to the growing evidence for rapid field amplification in galaxies.

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Cited by 3 Pith papers

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