Radio galaxies and magnetic fields in A514

Details Radio galaxies and magnetic fields in A514 Radio galaxies and magnetic fields in A514

2001-10-08

arxiv.org/abs/astro-ph/0110178v1

Astronomy and Astrophysics

Astrophysics

16 pages, 18 ps figures accepted by A&A

Scientific paper

10.1051/0004-6361:20011355

A514 contains six extended and polarized radio sources located at various projected distances from the cluster center. Here we present a detailed study of these six radio sources in total intensity and polarization using the Very Large Array at 3.6 and 6 cm. Since the radio sources sample different lines of sight across the cluster, an analysis of the Faraday Rotation Measures (RMs) provides information on the strength and the structure of the cluster magnetic field. These sources show a decreasing Faraday Rotation Measure with increasing distance from the cluster center. We estimate the strength of the magnetic field to be ~3-7 uG in the cluster center. From the RM structure across the stronger and more extended sources we estimate the coherence length of the magnetic field to be about 9 kpc at the cluster center.

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