Gravitational instability of suprathermal hydromagnetic plasma

On the propagation of hydromagnetic waves in a plasma of thermal and suprathermal components

“…So, the dynamical effect of suprathermal particles on the propagation of MHD waves is a topic of immense interest to study the behaviour of MHD waves in solar wind and flares. Magnetosonic eigenwaves in cosmic magnetic structures taking into account the anisotropic plasma pressure have been discussed by Nakariakov and Oraevsky (1995). No new modes were observed due to the presence of anisotropy except for the backward waves possible in the case of strong anisotropy.…”

“…They studied the propagation of suprathermal mode for various input parameters and remarked that ordinarily the thermal anisotropy should be short-lived but it could be significant in local regions. Similar problem was again undertaken by Kalra and Ghildyal (1996b) taking two infinitely conducting gravitating fluids. The presence of anisotropy introduces gravitational instability for low frequency waves.…”

“…Cosmic rays are made up of protons, electrons, positrons, and lesser amounts of nuclei of carbon, nitrogen, oxygen, and heavier atoms that strike our atmosphere from space (Wentzel 1974;Voelk 1975). The dynamical importance of the cosmic rays and its effect on the propagation of hydromagnetic waves have been described by Parker (1958Parker ( , 1963Parker ( , 1965. Various violent phenomena, for example novae, supernovae, active galactic nuclei, formation of hot stars, turbulence, etc.…”