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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2407.14549 |
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| _version_ | 1866910617826230272 |
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| author | Faraoni, Valerio Rinaldi, Massimiliano |
| author_facet | Faraoni, Valerio Rinaldi, Massimiliano |
| contents | It is shown that an exactly static and spherically symmetric black hole event horizon cannot be embedded in a time-dependent geometry. Forcing it to do so results in a naked null singularity at the would-be horizon. Therefore, since the universe is expanding, black holes must couple to the cosmological expansion, which was suggested as the growth mechanism for supermassive black holes in galaxies, with implications for the dark energy puzzle. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_14549 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Black hole event horizons are cosmologically coupled Faraoni, Valerio Rinaldi, Massimiliano General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics It is shown that an exactly static and spherically symmetric black hole event horizon cannot be embedded in a time-dependent geometry. Forcing it to do so results in a naked null singularity at the would-be horizon. Therefore, since the universe is expanding, black holes must couple to the cosmological expansion, which was suggested as the growth mechanism for supermassive black holes in galaxies, with implications for the dark energy puzzle. |
| title | Black hole event horizons are cosmologically coupled |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2407.14549 |