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Metric-Palatini gravity unifying local constraints and late-time cosmic acceleration
Open accessAbstract
We present a novel approach to modified theories of gravity which consists of adding to the Einstein-Hilbert Lagrangian an $f(\mathcal{R})$ term constructed \`a la Palatini. Using the respective dynamically equivalent scalar-tensor representation, we show that the theory can pass the Solar System observational constraints even if the scalar field is very light. This implies the existence of a long-range scalar field, which is able to modify the cosmological and galactic dynamics but leaves the Solar System unaffected. We also verify the absence of instabilities in perturbations and provide explicit models which are consistent with local tests and lead to the late-time cosmic acceleration.
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Citations
Cited by
Harko, T., Lobo, F. S. N., Nojiri, S., & Odintsov, S. D. (2011) · Physical Review D · doi:10.1103/physrevd.84.024020 · Cited by 2,772
Self-citationModified gravity theories on a nutshell: Inflation, bounce and late-time evolution
Nojiri, S., Odintsov, S. D., & Oikonomou, V. K. (2017) · Physics Reports · doi:10.1016/j.physrep.2017.06.001 · Cited by 2,734
Cosmology and Fundamental Physics with the Euclid Satellite
The Euclid Theory Working Group, Amendola, L., Appleby, S., Bacon, D., Baker, T., Baldi, M., Bartolo, N., Blanchard, A., Bonvin, C., Borgani, S., et al. (2013) · Living Reviews in Relativity · doi:10.12942/lrr-2013-6 · Cited by 899
Self-citationStellar structure models in modified theories of gravity: Lessons and challenges
Olmo, G. J., Rubiera-Garcia, D., & Wojnar, A. (2020) · Physics Reports · doi:10.1016/j.physrep.2020.07.001 · Cited by 253
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Metadata
- Authors
- Harko, T., Koivisto, T. S., Lobo, F. S. N., & Olmo, G. J.
- Venue
- Physical Review D
- Publisher
- American Physical Society (APS)
- Published
- 2012-04-19
- Volume
- 85
- Issue
- 8
- ISSN
- 0556-2821 (ISSN-L)
- 1550-7998
- 1550-2368
- OpenAlex
- W2044015082
- Cited by
- 215
- References
- 0
- FWCI
- 7.44
- Type
- journal article
- Language
- en
- Open access
- green
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- Harko, T., Koivisto, T. S., Lobo, F. S. N., & Olmo, G. J. (2012). Metric-Palatini gravity unifying local constraints and late-time cosmic acceleration. Physical Review D. https://doi.org/10.1103/physrevd.85.084016
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