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Binary system of unequal counterrotating Kerr-Newman sources

I. Cabrera-Munguia*

  • Departamento de Física, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-534, México D.F. 09340, México Departamento de Ciencias Básicas, Universidad Politécnica de Lázaro Cárdenas, 60950 Lázaro Cárdenas, Michoacán, México

  • *icabreramunguia@gmail.com
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Phys. Rev. D 91, 044005 – Published 3 February, 2015

DOI: https://doi.org/10.1103/PhysRevD.91.044005

Abstract

Stationary axisymmetric binary systems of unequal counterrotating Kerr-Newman sources with a massless strut in between are studied. By means of the choice of a suitable parametrization, the axis conditions and the absence of individual magnetic charges are fulfilled; thus, the entire metric reduces to a six-parametric asymptotically flat exact solution. Later on, with the purpose to describe interacting black holes, the analytic functional form of the horizon half-length parameter σk is obtained explicitly in terms of physical Komar parameters: mass Mk, electric charge Qk, angular momentum Jk, and coordinate distance R, where the seven physical parameters satisfy a simple algebraic relation. Finally, in the limit of extreme black holes, the full metric is derived in a closed analytical form, and a study on the absence or appearance of naked singularities off the axis is presented.

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Phys. Rev. D 91, 044005– Published 3 February, 2015
  • Received 14 November 2014

© 2015 American Physical Society

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