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Cluster magnetic fields from large-scale-structure and galaxy-cluster shocks

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arxiv astro-ph/0512079 v1 pith:QUTMDEH7 submitted 2005-12-04 astro-ph

Cluster magnetic fields from large-scale-structure and galaxy-cluster shocks

Mikhail V. Medvedev (U. Kansas) , Luis O. Silva (Inst. Superior Tech.) , Marc Kamionkowski (Caltech) This is my paper
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keywords fieldsshocksclusterclustersgalaxymagneticmediummicro-gauss
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The origin of the micro-Gauss magnetic fields in galaxy clusters is one of the outstanding problem of modern cosmology. We have performed three-dimensional particle-in-cell simulations of the nonrelativistic Weibel instability in an electron-proton plasma, in conditions typical of cosmological shocks. These simulations indicate that cluster fields could have been produced by shocks propagating through the intergalactic medium during the formation of large-scale structure or by shocks within the cluster. The strengths of the shock-generated fields range from tens of nano-Gauss in the intercluster medium to a few micro-Gauss inside galaxy clusters.

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Cited by 3 Pith papers

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