TY  - JOUR
AU  - Bambi, C.
AU  - Cardenas-Avendano, A.
AU  - Olmo, G. J.
AU  - Rubiera-Garcia, D.
PY  - 2016
DA  - 2016//
TI  - Wormholes and nonsingular spacetimes in Palatini f(R) gravity
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 064016
EP  - 8pp
VL  - 93
IS  - 6
PB  - Amer Physical Soc
AB  - We reconsider the problem of f(R) theories of gravity coupled to Born-Infeld theory of electrodynamics formulated in a Palatini approach, where metric and connection are independent fields. By studying electrovacuum configurations in a static and spherically symmetric spacetime, we find solutions which reduce to their Reissner-Nordstrom counterparts at large distances but undergo important nonperturbative modifications close to the center. Our new analysis reveals that the pointlike singularity is replaced by a finite-size wormhole structure, which provides a geodesically complete and thus nonsingular spacetime, despite the existence of curvature divergences at the wormhole throat. Implications of these results, in particular for the cosmic censorship conjecture, are discussed.
SN  - 2470-0010
UR  - http://arxiv.org/abs/1511.03755
UR  - https://doi.org/10.1103/PhysRevD.93.064016
DO  - 10.1103/PhysRevD.93.064016
LA  - English
N1  - WOS:000371742700005
ID  - Bambi_etal2016
ER  -