TY  - JOUR
AU  - Afonso, V. I.
AU  - Olmo, G. J.
AU  - Rubiera-Garcia, D.
PY  - 2017
DA  - 2017//
TI  - Scalar geons in Born-Infeld gravity
T2  - J. Cosmol. Astropart. Phys.
JO  - Journal of Cosmology and Astroparticle Physics
SP  - 031
EP  - 35pp
VL  - 08
IS  - 8
PB  - Iop Publishing Ltd
KW  - modified gravity
KW  - Wormholes
AB  - The existence of static, spherically symmetric, self-gravitating scalar field solutions in the context of Born-Infeld gravity is explored. Upon a combination of analytical approximations and numerical methods, the equations for a free scalar field (without a potential term) are solved, verifying that the solutions recover the predictions of General Relativity far from the center but finding important new effects in the central regions. We find two classes of objects depending on the ratio between the Schwarzschild radius and a length scale associated to the Born-Infeld theory: massive solutions have a wormhole structure, with their throat at r = 2 M, while for the lighter configurations the topology is Euclidean. The total energy density of these solutions exhibits a solitonic profile with a maximum peaked away from the center, and located at the throat whenever a wormhole exists. The geodesic structure and curvature invariants are analyzed for the various configurations considered.
SN  - 1475-7516
UR  - http://arxiv.org/abs/1705.01065
UR  - https://doi.org/10.1088/1475-7516/2017/08/031
DO  - 10.1088/1475-7516/2017/08/031
LA  - English
N1  - WOS:000408311900031
ID  - Afonso_etal2017
ER  -