Mathematics – Logic
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21344820x&link_type=abstract
American Astronomical Society, AAS Meeting #213, #448.20; Bulletin of the American Astronomical Society, Vol. 41, p.338
Mathematics
Logic
Scientific paper
Observations have revealed that the intra-cluster medium (ICM) of galaxy clusters could be significantly magnetized. Observations further revealed that magnetic fields in the ICM appear to have a power-law spectrum. It is often suggested that such magentic fields could be generated via a turbulent dynamo.
Here, we study a different scenario where significant magnetic fields are produced by supermassive black holes (SMBHs) in the centers of massive galaxies, then these magnetic fields are transported to the wider ICM via jets/lobes during the lifetime of active galaxies ( 100 Myr). Subsequent cluster mergers during the cluster evolution (up to 10 Gyr) will stir, shear, and shock the ICM as well as the magnetic fields provided by SMBHs. We present numerical simulations of the evolution of magnetic fields from SMBH in cluster using the newly developed MHD version of ENZO, a cosmological MHD code with adaptive mesh refinement. The magnetic field energy and its power spectrum, along with the ICM dynamics, will be discussed in detail. We will discuss the implications for MHD turbulence and dynamo mechanisms in the ICM. This work was supported by IGPP program at LANL.
Li Handong
Norman Michael L.
Xu Hao
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