The influence of cosmic-rays on the magnetorotational instability
arXiv:1108.1687 · doi:10.1007/s10509-011-0829-0
Abstract
We present a linear perturbation analysis of the magnetorotational instability in the presence of the cosmic rays. Dynamical effects of the cosmic rays are considered by a fluid description and the diffusion of cosmic rays is only along the magnetic field lines. We show an enhancement in the growth rate of the unstable mode because of the existence of cosmic rays. But as the diffusion of cosmic rays increases, we see that the growth rate decreases. Thus, cosmic rays have a destabilizing role in the magnetorotational instability of the accretion discs.
Accepted for publication in Astrophysics & Space Science
References in corpus (2)
Cited by in corpus (4)
- Analysis of the magneto-rotational instability with the effect of cosmic-ray diffusion
- Linear Growth of the Kelvin-Helmholtz Instability with an Adiabatic Cosmic-ray Gas
- Radio broadband visualization of global three-dimensional magneto-hydrodynamical simulations of spiral galaxies I. Faraday rotation at 8GHz
- Streaming cold cosmic ray back-reaction and thermal instabilities across the background magnetic field