Equilibrium configurations of two charged masses in General Relativity

Details Equilibrium configurations of two charged masses in General Relativity Equilibrium configurations of two charged masses in General Relativity

2007-06-13

arxiv.org/abs/0706.1981v1

Phys.Rev.D76:021501,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages; accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.76.021501

An asymptotically flat static solution of Einstein-Maxwell equations which describes the field of two non-extreme Reissner - Nordstr\"om sources in equilibrium is presented. It is expressed in terms of physical parameters of the sources (their masses, charges and separating distance). Very simple analytical forms were found for the solution as well as for the equilibrium condition which guarantees the absence of any struts on the symmetry axis. This condition shows that the equilibrium is not possible for two black holes or for two naked singularities. However, in the case when one of the sources is a black hole and another one is a naked singularity, the equilibrium is possible at some distance separating the sources. It is interesting that for appropriately chosen parameters even a Schwarzschild black hole together with a naked singularity can be "suspended" freely in the superposition of their fields.

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