Shadow bound of black holes with dark matter halo
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866914667861901312 |
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| author | Myung, Yun Soo |
| author_facet | Myung, Yun Soo |
| contents | We investigate the shadow cast of black holes immersed in a dark matter halo. We use the M87* shadow data obtained by the EHT collaboration to constrain two parameters ($M,a$) of dark matter halo surrounding a black hole with mass $M_{\rm bh}$. For $a\ge10.8M$, we find the favored region (shadow bound), while the disfavored region is found for $a<10.8M$ when imposing the EHT results. This shadow bound is much less than the observation bound of galaxies ($a\ge 10^4 M$). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_03606 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Shadow bound of black holes with dark matter halo Myung, Yun Soo General Relativity and Quantum Cosmology We investigate the shadow cast of black holes immersed in a dark matter halo. We use the M87* shadow data obtained by the EHT collaboration to constrain two parameters ($M,a$) of dark matter halo surrounding a black hole with mass $M_{\rm bh}$. For $a\ge10.8M$, we find the favored region (shadow bound), while the disfavored region is found for $a<10.8M$ when imposing the EHT results. This shadow bound is much less than the observation bound of galaxies ($a\ge 10^4 M$). |
| title | Shadow bound of black holes with dark matter halo |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2402.03606 |