Περίληψη:
The excitation of cosmological perturbations in an anisotropic cosmological model and in the presence of a homogeneous magnetic
field was studied, using the resistive magnetohydrodynamic (MHD) equations. We have shown that fast-magnetosonic modes, propagating
normal to the magnetic field, grow exponentially and saturate at high values, due to the resistivity. We also demonstrate
that Jeans-like instabilities can be enhanced inside a resistive fluid and that the formation of condensations influence the growing
magnetosonic waves.