Radio halos in merging clusters of galaxies

Details Radio halos in merging clusters of galaxies Radio halos in merging clusters of galaxies

2004-04-26

arxiv.org/abs/astro-ph/0404498v1

Astronomy and Astrophysics

Astrophysics

3 pages, 2 figures. Proceedings of IAU Colloquium 195 - Outskirts of Galaxy Clusters: intense life in the suburbs

Scientific paper

10.1017/S1743921304000183

We present the preliminary results of 235 MHz, 327 MHz and 610 MHz observations of the galaxy cluster A3562 in the core of the Shapley Concentration. The purpose of these observations, carried out with the Giant Metrewave Radio Telescope (GMRT, Pune, India) was to study the radio halo located at the centre of A3562 and determine the shape of its radio spectrum at low frequencies, in order to understand the origin of this source. In the framework of the re--acceleration model, the preliminary analysis of the halo spectrum suggests that we are observing a young source (few $10^8$ yrs) at the beginning of the re--acceleration phase.

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