Charged perfect fluid disks as sources of Taub-NUT-type spacetimes

Details Charged perfect fluid disks as sources of Taub-NUT-type spacetimes Charged perfect fluid disks as sources of Taub-NUT-type spacetimes

2008-10-14

arxiv.org/abs/0810.2575v1

Phys. Rev. D, 70, 104005 (2004)

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, Revtex4

Scientific paper

10.1103/PhysRevD.70.104005

The interpretation of a family of electrovacuum stationary Taub-NUT-type fields in terms of finite charged perfect fluid disks is presented. The interpretation is mades by means of an "inverse problem" approach used to obtain disk sources of known solutions of the Einstein or Einstein-Maxwell equations. The diagonalization of the energy-momentum tensor of the disks is facilitated in this case by the fact that it can be written as an upper right triangular matrix. We find that the inclusion of electromagnetic fields changes significatively the different material properties of the disks and so we can obtain, for some values of the parameters, finite charged perfect fluid disks that are in agreement with all the energy conditions.

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