Cosmological coupling of local gravitational systems
Fuente:
arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866909224501510144 |
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| author | Cadoni, Mariano Pitzalis, Mirko Rodrigues, Davi C. Sanna, Andrea P. |
| author_facet | Cadoni, Mariano Pitzalis, Mirko Rodrigues, Davi C. Sanna, Andrea P. |
| contents | We investigate the cosmological coupling of spherical, local astrophysical systems. We derive a general formula quantifying the cosmological coupling of the Misner-Sharp mass of these objects. We show that, in the weak-field limit, the cosmological coupling is only allowed if there are pressure anisotropies. We also apply our results to galaxies, modelling them with the Navarro-Frenk-White and Einasto profiles. We show that the galactic mass can be coupled to the cosmological dynamics and examine its dependence on the scale factor of the universe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_06091 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cosmological coupling of local gravitational systems Cadoni, Mariano Pitzalis, Mirko Rodrigues, Davi C. Sanna, Andrea P. General Relativity and Quantum Cosmology Astrophysics of Galaxies We investigate the cosmological coupling of spherical, local astrophysical systems. We derive a general formula quantifying the cosmological coupling of the Misner-Sharp mass of these objects. We show that, in the weak-field limit, the cosmological coupling is only allowed if there are pressure anisotropies. We also apply our results to galaxies, modelling them with the Navarro-Frenk-White and Einasto profiles. We show that the galactic mass can be coupled to the cosmological dynamics and examine its dependence on the scale factor of the universe. |
| title | Cosmological coupling of local gravitational systems |
| topic | General Relativity and Quantum Cosmology Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2406.06091 |