TY  - JOUR
AU  - Nascimento, J. R.
AU  - Olmo, G. J.
AU  - Porfirio, P. J.
AU  - Petrov, A. Y.
AU  - Soares, A. R.
PY  - 2019
DA  - 2019//
TI  - Global monopole in Palatini f(R) gravity
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 064053
EP  - 11pp
VL  - 99
IS  - 6
PB  - Amer Physical Soc
AB  - 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.
SN  - 2470-0010
UR  - https://arxiv.org/abs/1812.00471
UR  - https://doi.org/10.1103/PhysRevD.99.064053
DO  - 10.1103/PhysRevD.99.064053
LA  - English
N1  - WOS:000462920100010
ID  - Nascimento_etal2019
ER  -