On the Thermal Conduction in Tangled Magnetic Fields in Clusters of Galaxies | Zendy

Leonid Malyshkin | Zendy

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On the Thermal Conduction in Tangled Magnetic Fields in Clusters of Galaxies

Author(s) -

Leonid Malyshkin

Publication year - 2001

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/321346

Subject(s) - thermal conduction , magnetic field , thermal conductivity , physics , electron , galaxy , homogeneous , thermal , field (mathematics) , condensed matter physics , astrophysics , statistical physics , thermodynamics , quantum mechanics , mathematics , pure mathematics

Thermal conduction in tangled magnetic fields is reduced because heatconducting electrons must travel along the field lines longer distances betweenhot and cold regions of space than if there were no fields. We consider thecase when the tangled magnetic field has a weak homogeneous component. Weexamine two simple models for temperature in clusters of galaxies: atime-independent model and a time-dependent one. We find that the actual valueof the effective thermal conductivity in tangled magnetic fields depends on howit is defined for a particular astrophysical problem. Our final conclusion isthat the heat conduction never totally suppressed but is usually important inthe central regions of galaxy clusters, and therefore, it should not beneglected.Comment: 16 pages, 4 figure

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