A Comparison of Radio and X-Ray Morphologies of Four Clusters of Galaxies Containing Radio Halos

Details A Comparison of Radio and X-Ray Morphologies of Four Clusters of Galaxies Containing Radio Halos A Comparison of Radio and X-Ray Morphologies of Four Clusters of Galaxies Containing Radio Halos

2001-01-23

arxiv.org/abs/astro-ph/0101418v1

Astronomy and Astrophysics

Astrophysics

9 pages, 13 .ps figures, accepted by A&A

Scientific paper

10.1051/0004-6361:20010115

Clusters of galaxies may contain cluster-wide, centrally located, diffuse radio sources, called halos. They have been found to show morphologies similar to those of the X-ray emission. To quantify this qualitative statement we performed a point-to-point comparison of the radio and the X-ray emission for four clusters of galaxies containing radio halos: Coma, Abell 2255, Abell 2319, Abell 2744. Our study leads to a linear relation between the radio and the X-ray surface brightness in two clusters, namely Abell 2255 and Abell 2744. In Coma and A2319 the radio and the X-ray brightnesses seem to be related with a sub-linear power law. Implications of these findings within simple radio halo formation models are briefly discussed.

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