RT Journal Article
T1 New scalar compact objects in Ricci-based gravity theories
A1 Afonso, Victor I.
A1 Olmo, Gonzalo J.
A1 Orazi, Emanuele
A1 Rubiera García, Diego
AB Taking advantage of a previously developed method, which allows to map solutions of General Relativity into a broad family of theories of gravity based on the Ricci tensor (Ricci-based gravities), we find new exact analytical scalar field solutions by mapping the free-field static, spherically symmetric solution of General Relativity (GR) into quadratic f(R) gravity and the Eddington-inspired Born-Infeld gravity. The obtained solutions have some distinctive feature below the would-be Schwarzschild radius of a configuration with the same mass, though in this case no horizon is present. The compact objects found include wormholes, compact balls, shells of energy with no interior, and a new kind of object which acts as a kind of wormhole membrane. The latter object has Euclidean topology but connects antipodal points of its surface by transferring particles and null rays across its interior in virtually zero affine time. We point out the relevance of these results regarding the existence of compact scalar field objects beyond General Relativity that may effectively act as black hole mimickers.
PB IOP Publishing
SN 1475-7516
YR 2019
FD 2019-12
LK https://hdl.handle.net/20.500.14352/6063
UL https://hdl.handle.net/20.500.14352/6063
LA eng
NO © 2019 Iop PublishingGJO is funded by the Ramon y Cajal contract RYC-2013-13019 (Spain). DRG is funded by the Atraccion de Talento Investigador programme of the Comunidad de Madrid (Spain) No. 2018-T1/TIC-10431, and acknowledges further support from the Fundacao para a Ciencia e a Tecnologia (FCT, Portugal) research projects Nos. PTDC/FIS-OUT/29048/2017 and PTDC/FIS-PAR/31938/2017. VIA is partially supported by Federal University of Campina Grande, Brazil. This work is supported by the Spanish projects FIS2014-57387-C3-1-P and FIS2017-84440-C2-1-P (MINECO/FEDER, EU), the project H2020-MSCA-RISE-2017 Grant FunFiCO-777740, the project SEJI/2017/042 (Generalitat Valenciana), the Consolider Program CPANPHY-1205388, the Severo Ochoa grant SEV-2014-0398 (Spain) and the Edital 006/2018 PRONEX (FAPESQ-PB/CNPQ, Brazil). This article is based upon work from COST Action CA15117, supported by COST (European Cooperation in Science and Technology). VIA and DRG thank the Department of Physics and IFIC of the University of Valencia for their hospitality during different stages of the elaboration of this work. We finally thank Fernando Barbero for useful discussions.
NO Unión Europea. Horizonte 2020
NO Ministerio de Economía y Competitividad (MINECO)/FEDER
NO Comunidad de Madrid
NO Generalitat Valenciana
NO Programa Ramón y Cajal
NO Centro de Excelencia Severo Ochoa
NO Fundação para a Ciência e a Tecnologia (FCT)
NO Centro Nacional de Física de Partículas, Astropartículas y Nuclear (CPAN)
DS Docta Complutense
RD 11 may 2025