Modes of propagation and instabilities in finitely conducting neutrino-modified magnetohydrodynamic viscous plasma

2021 
Low-frequency wave propagations and instabilities are studied taking into account the finite electrical resistivity and viscosity of the neutrino-coupled plasma. It is assumed that the plasma is permeated by magnetic field. The formulation and analysis of the system including the Fermi weak force due to neutrino plasma coupling is done by neutrino magneto hydrodynamics model. The general dispersion relation is derived from the set of perturbed equations to signify the role of dissipative effects on the growth rate and condition of both neutrino instability and self-gravitational instability. To discuss the influence of resistivity and viscosity on the dynamics of the system, the general dispersion relation is reduced for both perpendicular and parallel mode of propagations. The self-gravitating modes are modified by the presence of neutrinos, viscosity, and resistivity in both perpendicular and parallel modes of propagation, while the gravitational instability criterion is modified only by neutrinos. It is also observed that the number density of neutrinos works against the gravitational instability, while the neutrino beam-free energy supports the self-gravitational instability. In the case of perpendicular propagation, the neutrino beam instability criterion and growth rate are affected by dissipative effects.
    • Correction
    • Source
    • Cite
    • Save
    • Machine Reading By IdeaReader
    38
    References
    0
    Citations
    NaN
    KQI
    []