Linear cosmological perturbations in scalar-tensor-vector gravity
We investigate the cosmological perturbations in the context of a Scalar-Tensor-Vector theory of Gravity known as MOG in the literature. Recent investigations show that MOG reproduces a viable background cosmological evolution comparable to ΛCDM. However, the matter dominated era is slightly differe...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
20 January 2020
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| In: |
Physics letters
Year: 2020, Volume: 802 |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2020.135238 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2020.135238 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0370269320300423 
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| Author Notes: | Sara Jamali, Mahmood Roshan, Luca Amendola |
| Summary: | We investigate the cosmological perturbations in the context of a Scalar-Tensor-Vector theory of Gravity known as MOG in the literature. Recent investigations show that MOG reproduces a viable background cosmological evolution comparable to ΛCDM. However, the matter dominated era is slightly different. In this paper, we study the linear matter perturbations and estimate the relevant modified gravity parameters. We show that MOG reduces the growth rate of the perturbations and comparing with the RSD data reveals that MOG suggests a higher value for σ8, compare to ΛCDM. This point, constitute a powerful challenge to the cosmological viability of MOG. |
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| Item Description: | Gesehen am 20.04.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1873-2445 |
| DOI: | 10.1016/j.physletb.2020.135238 |