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Constraints on perturbative f(R) gravity via neutron stars
Open accessAbstract
We study the structure of neutron stars in perturbative f ( R ) gravity models with realistic equations of state. We obtain mass-radius relations in a gravity model of the form f ( R ) = R +α R 2 . We find that deviations from the results of general relativity, comparable to the variations due to using different equations of state (EoS'), are induced for |α| ∼ 10 9 cm 2 . Some of the soft EoS' that are excluded within the framework of general relativity can be reconciled with the 2 solar mass neutron star recently observed for certain values of α within this range. For some of the EoS' we find that a new solution branch, which allows highly massive neutron stars, exists for values of α greater than a few 10 9 cm 2 . We find constraints on α for a variety of EoS' using the recent observational constraints on the mass-radius relation. These are all 5 orders of magnitude smaller than the recent constraint obtained via Gravity Probe B for this gravity model. The associated length scale cm is only an order of magnitude smaller than the typical radius of a neutron star, the probe used in this test. This implies that real deviations from general relativity can be even smaller.
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Cites
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
Riess, A. G., Filippenko, A. V., Challis, P., Clocchiatti, A., Diercks, A., Garnavich, P. M., Gilliland, R. L., Hogan, C. J., Jha, S., Kirshner, R. P., et al. (1998) · The Astronomical Journal · doi:10.1086/300499 · Cited by 19,704
Measurements of Ω and Λ from 42 High‐Redshift Supernovae
Perlmutter, S., Aldering, G., Goldhaber, G., Knop, R. A., Nugent, P., Castro, P. G., Deustua, S., Fabbro, S., Goobar, A., Groom, D. E., et al. (1999) · The Astrophysical Journal · doi:10.1086/307221 · Cited by 18,062
Spergel, D. N., Verde, L., Peiris, H. V., Komatsu, E., Nolta, M. R., Bennett, C. L., Halpern, M., Hinshaw, G., Jarosik, N., Kogut, A., et al. (2003) · The Astrophysical Journal Supplement Series · doi:10.1086/377226 · Cited by 10,976
Three‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Implications for Cosmology
Spergel, D. N., Bean, R., Dore, O., Nolta, M. R., Bennett, C. L., Dunkley, J., Hinshaw, G., Jarosik, N., Komatsu, E., Page, L., et al. (2007) · The Astrophysical Journal Supplement Series · doi:10.1086/513700 · Cited by 6,778
Riess, A. G., Strolger, L., Tonry, J., Casertano, S., Ferguson, H. C., Mobasher, B., Challis, P., Filippenko, A. V., Jha, S., Li, W., et al. (2004) · The Astrophysical Journal · doi:10.1086/383612 · Cited by 4,315
The acceleration of the universe and the physics behind it
Uzan, J.-P. (2007) · General Relativity and Gravitation · doi:10.1007/s10714-006-0385-z · Cited by 168
Cited by
Modified 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
Stellar 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
Metadata
- Authors
- Arapoğlu, S., Deliduman, C., & Ekşi, K. Y.
- Venue
- Journal of Cosmology and Astroparticle Physics
- Publisher
- IOP Publishing
- Published
- 2011-07-11
- Volume
- 2011
- Issue
- 07
- Pages
- 020-020
- ISSN
- 1475-7508 (ISSN-L)
- 1475-7516
- OpenAlex
- W2077161413
- Cited by
- 223
- References
- 6
- FWCI
- 3.46
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Arapoğlu, S., Deliduman, C., & Ekşi, K. Y. (2011). Constraints on perturbative f(R) gravity via neutron stars. Journal of Cosmology and Astroparticle Physics. https://doi.org/10.1088/1475-7516/2011/07/020
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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