Thermal Conduction in Clusters of Galaxies | Zendy

Ramesh Narayan | Zendy; Mikhail V. Medvedev | Zendy

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Thermal Conduction in Clusters of Galaxies

Author(s) -

Ramesh Narayan,

Mikhail V. Medvedev

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 - 10.1086/338325

Subject(s) - thermal conduction , physics , thermal conductivity , galaxy , astrophysics , galaxy cluster , thermal , chaotic , plasma , condensed matter physics , wave vector , meteorology , nuclear physics , quantum mechanics , artificial intelligence , computer science

We estimate the thermal conductivity of a weakly collisional magnetizedplasma with chaotic magnetic field fluctuations. When the fluctuation spectrumextends over two or more decades in wave-vector, we find that thermalconduction is very efficient; the conduction coefficient is only a factor ~5below the classical Spitzer estimate. We suggest that conduction could play asignificant role in cooling flows in clusters of galaxies.Comment: 4 pages, 2 figures. Accepted for publication in ApJ Letter

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