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Jets from active galactic nuclei (AGN) in the cores of galaxy clusters havethe potential to be a major contributor to the energy budget of theintracluster medium (ICM). To study the dependence of the interaction betweenthe AGN jets and the ICM on the parameters of the jets themselves, we present aparameter survey of two-dimensional (axisymmetric) ideal hydrodynamic models ofback-to-back jets injected into a cluster atmosphere (with varying Mach numbersand kinetic luminosities). We follow the passive evolution of the resultingstructures for several times longer than the active lifetime of the jet. Thesimulations fall into roughly two classes, cocoon-bounded and non-cocoonbounded sources. We suggest a correspondence between these two classes and theFaranoff-Riley types. We find that the cocoon-bounded sources injectsignificantly more entropy into the core regions of the ICM atmosphere, eventhough the efficiency with which energy is thermalized is independent of themorphological class. In all cases, a large fraction (50--80%) of the energyinjected by the jet ends up as gravitational potential energy due to theexpansion of the atmosphere.

Energetic Impact of Jet Inflated Cocoons in Relaxed Galaxy Clusters