期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2017/08/031
关键词
modified gravity; Wormholes
资金
- postdoctoral fellowship CNPq-Brasil/PDE [234432/2014-4]
- Federal University of Campina Grande (Brazil)
- Ramon y Cajal contract
- MINECO [FIS2014-57387-C3-1-P]
- Fundacao para a Ciencia e a Tecnologia (FCT, Portugal) [SFRH/BPD/102958/2014]
- FCT [UID/FIS/04434/2013]
- Spanish Research Council (CSIC) [i-COOPB20105]
- Consolider Program [CPANPHY-1205388]
- Severo Ochoa (Spain) [SEV-2014-0398]
- CNPq (Brazilian agency) [301137/2014-5]
- COST (European Cooperation in Science and Technology) [CA15117]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/102958/2014] Funding Source: FCT
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.
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