Einstein Cluster as Central Spiky Distribution of Galactic Dark Matter
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866917795710631936 |
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| author | Maeda, Kei-ichi Cardoso, Vitor Wang, Anzhong |
| author_facet | Maeda, Kei-ichi Cardoso, Vitor Wang, Anzhong |
| contents | Using the Einstein cluster models, we construct a fully relativistic, spherically symmetric, spiky structure of matter distribution near a supermassive black hole. We introduce and discuss three simple toy models, together with a more realistic model, which includes a Hernquist-type distribution with a typical galaxy scale. We find that the innermost stable circular orbit (ISCO) depends on the details of the environment, and lies between the photon radius (at $3M_{\rm BH}$) and the ISCO radius of an isolated black hole of mass $M_{\rm BH}$ (at $6M_{\rm BH}$). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_04175 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Einstein Cluster as Central Spiky Distribution of Galactic Dark Matter Maeda, Kei-ichi Cardoso, Vitor Wang, Anzhong General Relativity and Quantum Cosmology Using the Einstein cluster models, we construct a fully relativistic, spherically symmetric, spiky structure of matter distribution near a supermassive black hole. We introduce and discuss three simple toy models, together with a more realistic model, which includes a Hernquist-type distribution with a typical galaxy scale. We find that the innermost stable circular orbit (ISCO) depends on the details of the environment, and lies between the photon radius (at $3M_{\rm BH}$) and the ISCO radius of an isolated black hole of mass $M_{\rm BH}$ (at $6M_{\rm BH}$). |
| title | Einstein Cluster as Central Spiky Distribution of Galactic Dark Matter |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2410.04175 |