Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543628x&link_type=abstract
American Astronomical Society, AAS Meeting #215, #436.28; Bulletin of the American Astronomical Society, Vol. 42, p.388
Astronomy and Astrophysics
Astronomy
Scientific paper
Radio and X-ray observations of galaxy clusters have revealed a wealth of structures in their hot halos associated with extragalactic radio sources. Radio observations also confirmed micro Gauss magnetic fields (with unclear origins) permeating the Intra Cluster Medium (ICM). Structures in the form of large scale cavities and weak shocks provide a reliable gauge of the energy output of extragalactic radio jets launched by Active Galactic Nuclei (AGNs) . The energies involved range between 1E57 to 1E62 ergs. Furthermore, the nature of AGN outflows are strongly constrained by the morphology and properties of radio jets on small scales and of cavities on large scales. We will present magnetohydrodynamic (MHD) simulations of AGN feedback in galaxy clusters, emphasizing the important role of magnetic fields in carrying the AGN energy and in the formation of radio jet/lobes and X-ray cavities. We will discuss details of the formation and morphology of the jet/lobe system. We will also discuss the origin and energetics of the cluster-wide magnetic fields. We demonstrate that the ICM turbulence is excited and sustained by the frequent mergers during the cluster formation. This turbulence excites a small scale dynamo process that transports, spreads, and amplifies the local fields originated from the radio jet/lobe system. This process could be the primary process of populating the whole cluster with magnetic fields.
This work was supported by the LDRD and IGPP programs at LANL.
Li Handong
Xu Hao
No associations
LandOfFree
Magnetic Jet/lobes From Agns And The Icm Magnetic Fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magnetic Jet/lobes From Agns And The Icm Magnetic Fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic Jet/lobes From Agns And The Icm Magnetic Fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-968644