Gravity beyond general relativity

Kazuya Koyama

doi:10.1142/S0218271818480012

Gravity beyond general relativity

Kazuya Koyama

Institute of Cosmology & Gravitation

Research output: Contribution to journal › Article › peer-review

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Abstract

We introduce the standard model of cosmology based on general relativity and discuss its successes and problems. We then discuss motivations to consider gravitational theories beyond general relativity and summarise observational and theoretical constraints that these theories need to satisfy. A special focus is laid on screening mechanisms, which hide deviations from general relativity in the Solar System and enable large modifications to general relativity on astrophysical and cosmological scales. Finally, several modified gravity models are introduced, which satisfy the Solar System constrains as well as the constraint on the speed of gravitational waves obtained from almost simultaneous detections of gravitational waves and gamma ray bursts from a neutron star merger (GW170817/GRB 170817A).

Original language	English
Article number	1848001
Pages (from-to)	1-39
Number of pages	39
Journal	International Journal of Modern Physics D
Volume	27
Issue number	15
DOIs	https://doi.org/10.1142/S0218271818480012
Publication status	Published - 16 Jul 2018

Keywords

RCUK
STFC
ST/N000668/1
cosmology
general relativity
modified gravity

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10.1142/S0218271818480012

chapter1_v2_repository
Electronic version of an article published as International Journal of Modern Physics D, Volume 27, Issue 15, 2018, pp. 1-39. DOI: 10.1142/S0218271818480012 © World Scientific Publishing Company. https://www.worldscientific.com/worldscinet/ijmpd.
Accepted author manuscript (Post-print), 702 KB

Data availability statement for 'Gravity beyond general relativity'.
Koyama, K. (Creator), University of Portsmouth, 11 Jun 2018
Dataset

Cosmological Tests of Gravity
Koyama, K.
European Research Council
1/09/15 → 31/08/20
Project: Research

Cite this

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Gravity beyond general relativity

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Data availability statement for 'Gravity beyond general relativity'.

Projects

Cosmological Tests of Gravity

Cite this