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- Title
The influence of cosmic-rays on the magnetorotational instability.
- Authors
Khajenabi, Fazeleh
- 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.
- Subjects
COSMIC rays; ACTIVE galaxies; BLACK holes; ASTRONOMICAL perturbation; DIFFUSION; MAGNETIC fields; COSMIC rotation
- Publication
Astrophysics & Space Science, 2012, Vol 337, Issue 1, p247
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-011-0829-0