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28 March 2024
 
  » arxiv » astro-ph/0410659

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Statistical Analysis of Extra-galactic Rotation Measures
M. Johnston-Hollitt ; C.P. Hollitt ; R.D. Ekers ;
Date 27 Oct 2004
Journal in "The Magnetized Interstellar Medium", Proceedings of the conference, held in Antalya, Turkey, September 8 - 12, 2003, Eds: B. Uyaniker, W. Reich & R. Wielebinski, Copernicus GmbH, Katlenburg-Lindau, p. 13-18, 2004
Subject astro-ph
AbstractWe have performed a statistical analysis of a sample of 1100 extra-galactic rotation measures (RMs) obtained from the literature. Using a subsample of approximately 800 reliable RMs we compute a rotation measure sky and determine reliable large scale features for the line of sight Galactic magnetic field. We find that the influence of the Milky Way can be seen up to roughly 30 degrees on either side of the Galactic plane. Furthermore we observe an excess of RM on spatial scales between 30 degrees and 50 degrees in the region of the Galactic Plane. Additionally, the support for a bisymmetric spiral Galactic magnetic field is significantly reduced in our analysis.
Source arXiv, astro-ph/0410659
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