Magnetic fields in the Centaurus cluster

Details Magnetic fields in the Centaurus cluster Magnetic fields in the Centaurus cluster

2001-09-20

arxiv.org/abs/astro-ph/0109337v1

Mon.Not.Roy.Astron.Soc.334:769,2002

Astronomy and Astrophysics

Astrophysics

7 pages, 10 figures (3 colour), submitted to MNRAS

Scientific paper

10.1046/j.1365-8711.2002.05555.x

We present multi-frequency VLA observations of the radio galaxy PKS 1246-410 at the center of the Centaurus Cluster, and compare these results to recent Chandra observations. The unusual radio morphology of PKS 1246-410 probably results from interactions with the hot, X-ray emitting gas. This gas, along with cluster magnetic fields, also produces substantial Faraday Rotation Measures towards PKS 1246-410. We discuss these observations in the context of a sample of 14 luminous X-ray clusters with embedded radio galaxies and possible cooling flows. A correlation is found between the cooling flow rate and the maximum Faraday Rotation Measures. Magnetic fields of strength 10-40 uG are found to be common to the centers of clusters with strong cooling flows, and somewhat lower field strengths of 2-10 uG are found in the non cooling-flow clusters.

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