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Scalar geons in Born-Infeld gravity
2017-09-19T16:27:07+00:002017-09-19T16:27:07+00:00Sergio Pastor Carpi
Afonso, V. I., Olmo, G. J., & Rubiera-Garcia, D. (2017). Scalar geons in Born-Infeld gravity. J. Cosmol. Astropart. Phys., 08(8), 031–35pp.
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.
Scalar geons in Born-Infeld gravityAfonso, V.I.Olmo, G.J.Rubiera-Garcia, D.info:doi/10.1088/1475-7516/2017/08/031openurl:?ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fhttps%3A%2F%2Freferences.ific.uv.es%2Frefbase%2F&genre=article&atitle=Scalar%20geons%20in%20Born-Infeld%20gravity&title=Journal%20of%20Cosmology%20and%20Astroparticle%20Physics&stitle=J.%20Cosmol.%20Astropart.%20Phys.&issn=1475-7516&date=2017&volume=08&issue=8&spage=031&epage=35pp&aulast=Afonso&aufirst=V.I.&au=Olmo%2C%20G.J.&au=Rubiera-Garcia%2C%20D.&pub=Iop%20Publishing%20Ltd&id=info%3Adoi%2F10.1088%2F1475-7516%2F2017%2F08%2F031&sid=refbase%3AIFICcitekey:Afonso_etal2017Afonso, V. I., Olmo, G. J., & Rubiera-Garcia, D. (2017). Scalar geons in Born-Infeld gravity. J. Cosmol. Astropart. Phys., 08(8), 031-35pp.2017JournalArticletextmodified gravityWormholesurl:http://arxiv.org/abs/1705.01065Iop Publishing LtdEnglish1475-7516Journal of Cosmology and Astroparticle Physics201708803135