Cooling cores and radio mini-halos

Details Cooling cores and radio mini-halos Cooling cores and radio mini-halos

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..329g&link_type=abstract

In: Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 J

Astronomy and Astrophysics

Astronomy

Galaxy Clusters

Scientific paper

We have recentely developed a model for the origin of radio mini-halos observed in some cooling flow clusters as due to synchrotron emission from relativistic electrons re-accelerated by MHD turbulence. Here we present the application of this model to mini-halo candidates. In agreement with the basic idea of the model i.e. that the energy necessary to power radio mini-halos is extracted by the cooling flows we find that the necessary energy rate for the re-acceleration of the electron population is a factor ~ 0.03-0.1 % of the total power supplied by the cooling flow. We also find a trend between radio power of mini-halo and cooling flow power. This trend is expected in the framework of the model. We find that even if cooling rates were overestimated cooling flow powers still are well above a factor of hundred the radio powers emitted by mini-halos.

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