Gravitational collapse of Matter in the presence of Scalar field Dark energy
Fuente:
arXiv
Salvato in:
| Autori principali: | , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866915785462513664 |
|---|---|
| author | Saha, Priyanka Dey, Dipanjan Bhattacharya, Kaushik |
| author_facet | Saha, Priyanka Dey, Dipanjan Bhattacharya, Kaushik |
| contents | This study examines the gravitational collapse of an overdense dark matter region in a coupled scalar field dark energy scenario within a flat FLRW background. It finds that, depending on the initial conditions, some overdense regions avoid collapse and expand eternally with the background. The interior overdense region follows a closed FLRW metric, while its boundary is described by generalized Vaidya spacetime, which allows flux across the boundary while preserving the homogeneity of dark energy inside. Dark matter evolves as cold dark matter, but in non-minimal coupling, the modified Klein-Gordon equation alters dark energy evolution. The results highlight the impact of coupled dark energy on dark matter virialization and cosmic structure formation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_07629 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gravitational collapse of Matter in the presence of Scalar field Dark energy Saha, Priyanka Dey, Dipanjan Bhattacharya, Kaushik General Relativity and Quantum Cosmology This study examines the gravitational collapse of an overdense dark matter region in a coupled scalar field dark energy scenario within a flat FLRW background. It finds that, depending on the initial conditions, some overdense regions avoid collapse and expand eternally with the background. The interior overdense region follows a closed FLRW metric, while its boundary is described by generalized Vaidya spacetime, which allows flux across the boundary while preserving the homogeneity of dark energy inside. Dark matter evolves as cold dark matter, but in non-minimal coupling, the modified Klein-Gordon equation alters dark energy evolution. The results highlight the impact of coupled dark energy on dark matter virialization and cosmic structure formation. |
| title | Gravitational collapse of Matter in the presence of Scalar field Dark energy |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2506.07629 |