Magnetic fields in cluster cores: Faraday rotation in A400 and A2634

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Accepted for ApJ. 43 pages including 10 embedded figures. Higher resolution versions of the figures available at http://www.

Scientific paper

10.1086/338376

We present Faraday rotation data for radio sources in the centers of the Abell clusters A400 and A2634. These clusters contain large (> 100 kpc), tailed radio sources, each attached to the central cD galaxy. These clusters do not have strong cooling cores. Our data extend previous work on rotation measure in cluster centers to larger scales and non-cooling clusters. The rotation measure, and thus the magnetic field, is ordered on scales 10-20 kpc in both clusters. The geometry of the rotation measure appears to be determined by the distribution of the X-ray emitting gas, rather than by the radio tails themselves. We combine our data with previously published X-ray and radio data in order to analyze the magnetic fields in all 12 clusters whose central radio sources have been imaged in rotation measure. We find that the fields are dynamically significant in most clusters. We argue that the Faraday data measure fields in the intracluster medium, rather than in a skin of the radio source. Finally, we consider the nature and maintenance of the magnetic fields in these clusters, and conclude that either the cluster-wide field exists at similar levels, or that a weaker cluster-wide field is amplified by effects in the core.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Magnetic fields in cluster cores: Faraday rotation in A400 and A2634 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Magnetic fields in cluster cores: Faraday rotation in A400 and A2634, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic fields in cluster cores: Faraday rotation in A400 and A2634 will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-710958

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.