Dynamics of a self--gravitating magnetized source

Rey, A. Ulacia; Martinez, A. Perez; Sussman, Roberto A.

Dynamics of a self--gravitating magnetized source

Authors

Rey, A. Ulacia

Martinez, A. Perez

Sussman, Roberto A.

Description

We consider a magnetized degenerate gas of fermions as the matter source of a homogeneous but anisotropic Bianchi I spacetime with a Kasner--like metric. We examine the dynamics of this system by means of a qualitative and numerical study of Einstein-Maxwell field equations which reduce to a non--linear autonomous system. For all initial conditions and combinations of free parameters the gas evolves from an initial anisotropic singularity into an asymptotic state that is completely determined by a stable attractor. Depending on the initial conditions the anisotropic singularity is of the ``cigar'' or ``plate'' types.
7 pages, 1 figure