Electron Transport in Tangled Magenetic Fields

Details Electron Transport in Tangled Magenetic Fields Electron Transport in Tangled Magenetic Fields

Nov 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aps..dpp.up250a&link_type=abstract

American Physical Society, 41st Annual Meeting of the Division of Plasma Physics, November 15-19, 1999 Seattle, WA, abstract #UP

Physics

Plasma Physics

Scientific paper

Galaxy clusters are believed to possess tangled magnetic fields that have small correlation lengths compared to the dimensions of the clusters and the collisional mean free paths of the electrons in the clusters. Thermal conduction in galaxy clusters plays a central role in their evolution, and the mass accretion rates in clusters are controlled by this parameter. Heat conduction in cluster plasmas is not well understood, however, and estimates of the thermal conductivity are too high to explain the observed mass accretion rates in cooling flows. This talk will demonstrate how an inhomogeneous magnetic field in a galaxy cluster may inhibit the transport of heat in such a medium by restricting the mobility of electrons both perpendicular to the magnetic field and also parallel to the field. A typical galaxy cluster may experience a reduction by a factor of 100 or more in its thermal conductivity from these effects. This is consistent with observations of cooling flows.

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