Abstract
It is shown that two new instabilities of hybrid type can occur in a rotating magnetized plasma with anisotropic pressure, i.e., the rotational firehose instability and the rotational mirror instability. In the case of β∥ > β⊥, where β∥ and β⊥ are the ratios of the parallel and perpendicular plasma pressure to the magnetic field pressure, the pressure anisotropy tends to suppress both new instabilities; in the case β⊥ > β∥, it leads to their strengthening. In the latter case, the perturbations considered can be unstable even if the Velikhov instability criterion is not satisfied.
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Mikhailovskii, A.B., Lominadze, J.G., Churikov, A.P. et al. Effect of pressure anisotropy on magnetorotational instability. J. Exp. Theor. Phys. 106, 371–379 (2008). https://doi.org/10.1134/S1063776108020155
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DOI: https://doi.org/10.1134/S1063776108020155