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00925njm 22002777a 4500 dc Afonso, Victor I. author Olmo, Gonzalo J. author Orazi, Emanuele author Rubiera García, Diego author 2019-12 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. 1475-7516 10.1088/1475-7516/2019/12/044 https://hdl.handle.net/20.500.14352/6063 http://dx.doi.org/10.1088/1475-7516/2019/12/044 https://iopscience.iop.org/ New scalar compact objects in Ricci-based gravity theories