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Testing general relativity in cosmology
1Department of Physics, The University of Texas at Dallas, Richardson, TX 75080 USA.
Living Reviews in Relativity
|January 8, 2019
Summary
This review explores testing general relativity (GR) on cosmic scales, examining modified gravity theories and their constraints. It provides an entry point for researchers into this rapidly growing field of cosmology.
Area of Science:
- Cosmology
- Gravitational Physics
Background:
- The study of cosmic acceleration and dark energy has driven research into testing general relativity (GR) at cosmological scales.
- Precision cosmology now motivates independent tests of gravitational physics on cosmic scales.
Purpose of the Study:
- To review recent developments and results in testing general relativity at cosmological scales.
- To provide an overview of cosmological probes, formalisms, and parameterizations for testing deviations from GR.
- To offer an entry point for students and researchers into the field of modified gravity.
Main Methods:
- Overview of cosmological probes of gravity.
- Examination of formalisms and parameterizations for testing deviations from GR.
- Summary of selected modified gravity (MG) theories and gravitational screening mechanisms.
- Inclusion of computer codes developed for these tests.
Main Results:
- Summaries of recent cosmological constraints on modified gravity parameters and models.
- Implications from recent binary neutron star merger events.
- Forecasts for modified gravity parameters, considering astrophysical systematics.
Conclusions:
- The review provides a comprehensive picture of testing gravity at cosmological scales.
- It serves as a reference for recent results and constraints in the field.
- It aims to facilitate entry for new researchers and students.
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