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  Novel Probes Project: Tests of gravity on astrophysical scales

Baker, T., Barreira, A., Desmond, H., Ferreira, P., Jain, B., Koyama, K., et al. (2021). Novel Probes Project: Tests of gravity on astrophysical scales. Reviews of Modern Physics, 93(1): 015003. doi:10.1103/RevModPhys.93.015003.

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Baker, Tessa, Author
Barreira, Alexandre1, Author              
Desmond, Harry, Author
Ferreira, Pedro, Author
Jain, Bhuvnesh, Author
Koyama, Kazuya, Author
Li, Baojiu, Author
Lombriser, Lucas, Author
Nicola, Andrina, Author
Sakstein, Jeremy, Author
Schmidt, Fabian2, Author              
Affiliations:
1Physical Cosmology, MPI for Astrophysics, Max Planck Society, ou_2205644              
2High Energy Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159881              

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 Abstract: The Novel Probes Project, an initiative to advance the field of astrophysical tests of the dark sector by creating a forum that connects observers and theorists, is introduced. This review focuses on tests of gravity and is intended to be of use primarily to observers, as well as theorists with an interest in the development of experimental tests. It is twinned with a separate upcoming review on dark matter self-interactions. The review focuses on astrophysical tests of gravity in the weak-field regime, ranging from stars to quasilinear cosmological scales. This regime is complementary to both strong-field tests of gravity and background and linear probes in cosmology. In particular, the nonlinear screening mechanisms that are an integral part of viable modified-gravity models lead to characteristic signatures, specifically on astrophysical scales. The potential of these probes is not limited by cosmic variance but comes with the challenge of building robust theoretical models of the nonlinear dynamics of stars, galaxies, and large-scale structure. The groundwork is laid for a thorough exploration of the weak-field, nonlinear regime, with an eye to using the current and next generation of observations for tests of gravity. The scene is set by showing how gravitational theories beyond general relativity are expected to behave, focusing primarily on screening mechanisms. Analytic and numerical techniques for exploring the relevant astrophysical regime are described, as are the pertinent observational signals. With these in hand a range of astrophysical tests of gravity are presented, and prospects for future measurements and theoretical developments are discussed.

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Language(s): eng - English
 Dates: 2021-02-10
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: DOI: 10.1103/RevModPhys.93.015003
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Title: Reviews of Modern Physics
  Abbreviation : Rev. Mod. Phys.
Source Genre: Journal
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Pages: - Volume / Issue: 93 (1) Sequence Number: 015003 Start / End Page: - Identifier: ISSN: 0034-6861