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Hybrid Metric-Palatini Gravity
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).ORCID iD: 0000-0002-9403-8565
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Number of Authors: 52015 (English)In: Universe, ISSN 2218-1997, Vol. 1, no 2, p. 199-238Article, review/survey (Refereed) Published
Abstract [en]

Recently, the phenomenology of f(R) gravity has been scrutinized. This scrutiny has been motivated by the possibility to account for the self-accelerated cosmic expansion without invoking dark energy sources. Besides, this kind of modified gravity is capable of addressing the dynamics of several self-gravitating systems alternatively to the presence of dark matter. It has been established that both metric and Palatini versions of these theories have interesting features but also manifest severe and different downsides. A hybrid combination of theories, containing elements from both these two formalisms, turns out to be also very successful accounting for the observed phenomenology and is able to avoid some drawbacks of the original approaches. This article reviews the formulation of this hybrid metric-Palatini approach and its main achievements in passing the local tests and in applications to astrophysical and cosmological scenarios, where it provides a unified approach to the problems of dark energy and dark matter.

Place, publisher, year, edition, pages
2015. Vol. 1, no 2, p. 199-238
Keywords [en]
modified gravity, late-time cosmic acceleration, dark matter, Solar System tests
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-159653DOI: 10.3390/universe1020199ISI: 000218455500006OAI: oai:DiVA.org:su-159653DiVA, id: diva2:1244720
Available from: 2018-09-03 Created: 2018-09-03 Last updated: 2019-12-17Bibliographically approved

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Koivisto, Tomi S.Lobo, Francisco S. N.
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