Variation in Magnetic Field Strength During a Specific Anisotropic Gravitational Collapse

Abstract

The MHD approximation has been made in general relativity to derive expressions in terms of the fluid's total proper energy density and rest-mass density for the variation in the strength of the magnetic field during the anisotropic gravitational collapse in which the condition ?ab HaHb = 0 holds throughout the collapse, where ?ab is the expansion tensor. The physical significance of this condition is also examined.