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

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

2005-03-09

arxiv.org/abs/astro-ph/0503226v1

Science 307 (2005) 1610-1612

Astronomy and Astrophysics

Astrophysics

15 pages, including 3 embedded EPS figures (1 color, 2 b/w) plus supporting on-line material; uses scicite.sty. To appear in S

Scientific paper

10.1126/science.1108832

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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