The Growth of Parker Instability with the Effect of Cosmic-Ray Diffusion

Details The Growth of Parker Instability with the Effect of Cosmic-Ray Diffusion The Growth of Parker Instability with the Effect of Cosmic-Ray Diffusion

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....4.1965k&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

Two-dimensional magnetohydro dynamic (MHD) simulation of a galactic Parker instability including the effect of an anisotropic Cosmic-Ray (CR) diffusion is performed. In this simulation, we take a two-temp erature layered disk model which is composed of gas, magnetic field, and cosmic rays in uniform gravity. A mechanical perturbation case and an explosion case are investigated. In the case of mechanical perturbation case, the growth rate becomes smaller as the diffusion coefficient of CR decreases. In the explosion case, when the diffusion coefficient is small, the growth rate is large in early stage, but it slows down after the top of the loop passes the disk surface.

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