%0 Journal Article
%T Global monopole in Palatini f(R) gravity
%A Nascimento, J. R.
%A Olmo, G. J.
%A Porfirio, P. J.
%A Petrov, A. Y.
%A Soares, A. R.
%J Physical Review D
%D 2019
%V 99
%N 6
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Nascimento_etal2019
%O WOS:000462920100010
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3966), last updated on Wed, 22 May 2019 10:45:31 +0000
%X We consider the space-time metric generated by a global monopole in an extension of general relativity (GR) of the form f(R) = R – lambda R-2. The theory is formulated in the metric-affine (or Palatini) formalism, and exact analytical solutions are obtained. For lambda < 0, one finds that the solution has the same characteristics as the Schwarzschild black hole with a monopole charge in Einstein's GR. For lambda > 0, instead, the metric is more closely related to the Reissner-Nordstrom metric with a monopole charge and, in addition, it possesses a wormhole-like structure that allows for the geodesic completeness of the spacetime. Our solution recovers the expected limits when lambda = 0 and also at the asymptotic far limit. The angular deflection of light in this space-time in the weak field regime is also calculated.
%R 10.1103/PhysRevD.99.064053
%U https://arxiv.org/abs/1812.00471
%U https://doi.org/10.1103/PhysRevD.99.064053
%P 064053-11pp