Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2006-06-20
Gen.Rel.Grav.38:885-906,2006
Physics
High Energy Physics
High Energy Physics - Theory
Scientific paper
10.1007/s10714-006-0270-9
The first-order correction of the perturbative solution of the coupled equations of the quadratic gravity and nonlinear electrodynamics is constructed, with the zeroth-order solution coinciding with the ones given by Ay\'on-Beato and Garc{\'\i}a and by Bronnikov. It is shown that a simple generalization of the Bronnikov's electromagnetic Lagrangian leads to the solution expressible in terms of the polylogarithm functions. The solution is parametrized by two integration constants and depends on two free parameters. By the boundary conditions the integration constants are related to the charge and total mass of the system as seen by a distant observer, whereas the free parameters are adjusted to make the resultant line element regular at the center. It is argued that various curvature invariants are also regular there that strongly suggests the regularity of the spacetime. Despite the complexity of the problem the obtained solution can be studied analytically. The location of the event horizon of the black hole, its asymptotics and temperature are calculated. Special emphasis is put on the extremal configuration.
Berej Waldemar
Matyjasek Jerzy
Tryniecki Dariusz
Woronowicz Mariusz
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