A new framework for cosmological expansion in a reformulated Newtonian-Like gravity with variable G
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866918088977416192 |
|---|---|
| author | Escórcio, Felipe S. Fabris, Júlio C. Toniato, Júnior D. Velten, Hermano |
| author_facet | Escórcio, Felipe S. Fabris, Júlio C. Toniato, Júnior D. Velten, Hermano |
| contents | A Newtonian-like theory inspired by the Brans-Dicke gravitational Lagrangian has been recently proposed in Ref. arXiv:2009.04434(v4). We propose here a new variant of this theory such that the usual Newtonian second law is preserved. The cosmological solutions are analysed and accelerated background expansion can be obtained even in a pure matter dominated universe. This happens due to the dynamic character of the effective gravitational coupling which is sourced by a time evolving scalar field . We also analyse the matter density perturbations and find they exhibit an enhanced growth in comparison with the usual Newtonian like behavior in Einstein-de Sitter model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_01468 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A new framework for cosmological expansion in a reformulated Newtonian-Like gravity with variable G Escórcio, Felipe S. Fabris, Júlio C. Toniato, Júnior D. Velten, Hermano General Relativity and Quantum Cosmology A Newtonian-like theory inspired by the Brans-Dicke gravitational Lagrangian has been recently proposed in Ref. arXiv:2009.04434(v4). We propose here a new variant of this theory such that the usual Newtonian second law is preserved. The cosmological solutions are analysed and accelerated background expansion can be obtained even in a pure matter dominated universe. This happens due to the dynamic character of the effective gravitational coupling which is sourced by a time evolving scalar field . We also analyse the matter density perturbations and find they exhibit an enhanced growth in comparison with the usual Newtonian like behavior in Einstein-de Sitter model. |
| title | A new framework for cosmological expansion in a reformulated Newtonian-Like gravity with variable G |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2409.01468 |