Evidence for AGN Feedback in Galaxy Clusters and Groups
Figure 2
(a) Cavity power of the central AGN, , versus the X-ray luminosity of the ICM inside the cooling region, . The cavity power is calculated assuming of energy per cavity and the buoyancy timescale. Different symbols denote systems in different samples presented in the literature: green triangles: Bîrzan et al. [8], red squares: Cavagnolo et al. [169], blue circles: O’Sullivan et al. [165]. 1 uncertainties on cavity power are indicated by error bars (see [165] for details). The diagonal line denotes . Credit O’Sullivan (private communication). (b) Cavity power of the central AGN, , versus integrated 10 MHz–10 GHz radio power, , for the systems in the sample of Bîrzan et al. (grey triangles) and the groups in the sample of O’Sullivan et al. (black circles). The solid fit line indicates the regression fit to the data points calculated by O’Sullivan et al. [165]. The dotted line indicates the relation found by Bîrzan et al. [8]. Adapted from O’Sullivan et al. [165].
