The cosmic trimmer: Black-hole hair in scalar-Gauss-Bonnet gravity is altered by cosmology
Fuente:
arXiv
Guardado en:
| Autores principales: | , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866929713856905216 |
|---|---|
| author | Babichev, Eugeny Sawicki, Ignacy Trombetta, Leonardo G. |
| author_facet | Babichev, Eugeny Sawicki, Ignacy Trombetta, Leonardo G. |
| contents | Static black holes in general relativity modified by a linear scalar coupling to the Gauss-Bonnet invariant always carry hair. We show that the same mechanism that creates the hair makes it incompatible with a cosmological horizon. Other scalar-tensor models do not have this problem when time dependence of the scalar provides a natural matching to cosmology. Scalar-Gauss-Bonnet gravity is particularly rigid, and such a scenario does not help. An extra operator makes the theory behave like the other models, and the cosmological horizon can be accommodated. The hair, however, is drastically altered. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_15537 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The cosmic trimmer: Black-hole hair in scalar-Gauss-Bonnet gravity is altered by cosmology Babichev, Eugeny Sawicki, Ignacy Trombetta, Leonardo G. General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Static black holes in general relativity modified by a linear scalar coupling to the Gauss-Bonnet invariant always carry hair. We show that the same mechanism that creates the hair makes it incompatible with a cosmological horizon. Other scalar-tensor models do not have this problem when time dependence of the scalar provides a natural matching to cosmology. Scalar-Gauss-Bonnet gravity is particularly rigid, and such a scenario does not help. An extra operator makes the theory behave like the other models, and the cosmological horizon can be accommodated. The hair, however, is drastically altered. |
| title | The cosmic trimmer: Black-hole hair in scalar-Gauss-Bonnet gravity is altered by cosmology |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2403.15537 |