From fundamental physics to tests with compact objects in metric-affine theories of gravity
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2020
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World Scientific
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This paper provides a short but comprehensible overview of some relevant aspects of metric-affine theories of gravity in relation to the physics and astrophysics of compact objects. We shall highlight the pertinence of this approach to supersede General Relativity on its strong-field regime, as well as its advantages and some of its difficulties. Moreover, we shall reflect on the present and future opportunities to test its predictions with relativistic and nonrelativistic stars, black holes, and other exotic horizonless compact objects.
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© 2020 World Scientific.
DRG is funded by the Atracciorn de Taiento Investigador programme of the Comunidad de Madrid, No. 2018-T1/T1C-10.131, and acknowledges support from the FCT research grant Nos. STRH/BPD/102958/2014 and PTDC/FIS-PAR/31938/2017, the projects FIS2014-57387-C3-1-P and FIS2017-84140-C2-1-P (MINECO/FEDER, ELT), the project SEJI/2017/042 (Generalitat Valenciana), and PRONEX (FAPESQ-PB/CNPQ, Brazil). This paper is based upon work front COST Actions CA15117 and CA18108, supported by COST (European Cooperation in Science and 'Technology). The author thanks Luis C. B. Crispin for the kind invitation to speak at the "V Amazonian Symposium on Physics" in Belem (Brazil), where this work was envisaged.