Nonthermal Emission Associated with Strong AGN Outbursts at the Centers of Galaxy Clusters

Understand

Recently, strong AGN outbursts at the centers of galaxy clusters have been found.

• Using a simple model, we study particle acceleration around a shock excited by an outburst and estimate nonthermal emission from the accelerated particles.
• We show that emission from secondary electrons is consistent with the radio observations of the minihalo in the Perseus cluster, if there was a strong AGN outburst >~10^8 yrs ago with an energy of ~1.8x10^62 erg.
• The validity of our model depends on the frequency of the large outbursts.