PT Journal
AU Nascimento, JR
   Olmo, GJ
   Porfirio, PJ
   Petrov, AY
   Soares, AR
TI Global monopole in Palatini f(R) gravity
SO Physical Review D
JI Phys. Rev. D
PY 2019
BP 064053
EP 11pp
VL 99
IS 6
DI 10.1103/PhysRevD.99.064053
LA English
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.
ER