58 research outputs found
Exact solution for two unequal counter-rotating black holes
The complete solution for two unequal counter-rotating black holes separated
by a massless strut, is developed in terms of four arbitrary parameters
involving two quantities \sigma 1 and \sigma 2 as the half length of the two
rods representing the black hole horizons, the total mass M and the relative
distance R between the centers of the horizons. A further attempt for
describing the explicit form of this solution in terms of the physical
parameters: The two Komar masses M1 and M2, Komar angular momenta per unit mass
a1 and a2 (a1 and a2 have opposite sign), and the coordinate distance R, guided
us to a 4-parameter subclass in which the five physical parameters satisfy a
simple algebraic relation and the interaction force in this scheme looks like
Schwarzschild type.Comment: This paper has been withdrawn for changes on i
Extreme binary black holes in a physical representation
Stationary axisymmetric binary systems of unequal co and counter-rotating
extreme Kerr black holes apart by a conical singularity are studied. Both
solutions are well identified as two -parametric subfamilies of the
Kinnersley-Chitre metric, and fully depicted by Komar parameters: the two
masses and , and a coordinate distance , where the angular
momenta and are functions of these parameters. Our physical
representation allows us to identify some limits and novel physical properties.Comment: 11 pages, 6 figures, 1 table; minor change
Corotating dyonic binary black holes
This paper is dedicated to derive and study binary systems of identical
corotating dyonic black holes separated by a massless strut -- two 5-parametric
corotating binary black hole models endowed with both electric and magnetic
charges-- where the dyonic black holes carrying equal/opposite electromagnetic
charges in the first/second model satisfy the extended Smarr formula for the
mass including the magnetic charge as a fourth conserved parameter.Comment: 12 pages, 1 figure, published versio
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