The answer is blowing in the wind: simulating the interaction of jets with dynamic cluster atmospheres

Type Journal Article
Names S. Heinz, M. Brüggen, A. Young, E. Levesque
Publication Monthly Notices of the Royal Astronomical Society Letters
Volume 373
Issue 1
Pages L65-L69
Date November 1, 2006
Short Title The answer is blowing in the wind
Library Catalog NASA ADS
Abstract We present numerical simulations investigating the interaction of active galactic nucleus jets with galaxy clusters, for the first time taking into account the dynamic nature of the cluster gas and detailed cluster physics. The simulations successfully reproduce the observed morphologies of radio sources in clusters. We find that cluster inhomogeneities and large-scale flows have a significant impact on the morphology of the radio source and cannot be ignored a priori when investigating radio source dynamics. Morphological comparison suggests that the gas in the centres of clusters like Virgo and Abell 4059 shows significant shear and/or rotation. We find that shear and rotation in the intracluster medium move large amounts of cold material back into the path of the jet, ensuring that subsequent jet outbursts encounter a sufficient column density of gas to couple with the inner cluster gas, thus alleviating the problem of evacuated channels discussed in the recent literature. The same effects redistribute the excess energy ΔE deposited by the jet, making the distribution of ΔE at late times consistent with being isotropic.
Tags GALAXIES: CLUSTERS: GENERAL, galaxies: jets, intergalactic medium
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