[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5303/JKAS.2004.37.5.547

GENERATION OF MAGNETIC FIELDS BY TEMPERATURE GRADIENTS

OKABE NOBUHIRO (Astronomical Institute, Tohoku University)
HATTORI MAKOTO (Astronomical Institute, Tohoku University)

Publication Information

Journal of The Korean Astronomical Society / v.37, no.5, 2004 , pp. 547-551 More about this Journal

Abstract

We showed that magnetic fields are generated in the plasma which have the temperature inhomogeneities. The mechanism is the same as the Weibel instability because the velocity distribution functions are at non-equilibrium and anisotropic under the temperature gradients. The growth timescale is much shorter than the dynamical time of structure formation. The coherence length of magnetic fields at the saturated time is much shorter than kpc scale and then, at nonlinear phase, become longer by inverse-cascade process. We report the application of our results to clusters of galaxies, not including hydrodynamic effects.

Keywords

clusters of galaxies; magnetic fields; instabilities; plasmas;

Citations & Related Records

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