Early Formation of Supermassive Black Holes via Dark Star Gravitational Instability
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909898537697280 |
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| author | Freese, Katherine Fuller, George M. Ghodla, Sohan Ilie, Cosmin Kehrer, Kyle S. Rindler-Daller, Tanja Sfakianakis, Evangelos I. |
| author_facet | Freese, Katherine Fuller, George M. Ghodla, Sohan Ilie, Cosmin Kehrer, Kyle S. Rindler-Daller, Tanja Sfakianakis, Evangelos I. |
| contents | We show that dark stars, which are dark-matter-powered stars in the early universe, can grow by accretion to masses in the range $\mathscr{O}\left ({10}^4\right )-\mathscr{O}\left ({10}^7\right)\,{M_\odot}$ before the general-relativistic Feynman-Chandrasekhar instability causes their dynamical collapse to black holes. These accreting dark star configurations avoid standard stellar nuclear- and weak-interaction evolution that would lead to their demise long before they reached this supermassive size. Remarkably, this mechanism for supermassive black hole (SMBH) genesis is relatively robust to initial dark star mass, formation epoch, accretion rate and its history. The SMBHs produced this way can serve as seeds for even larger SMBHs $({\gtrsim}10^9\,M_\odot)$ that have been discovered at high redshift. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_08578 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Early Formation of Supermassive Black Holes via Dark Star Gravitational Instability Freese, Katherine Fuller, George M. Ghodla, Sohan Ilie, Cosmin Kehrer, Kyle S. Rindler-Daller, Tanja Sfakianakis, Evangelos I. Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology We show that dark stars, which are dark-matter-powered stars in the early universe, can grow by accretion to masses in the range $\mathscr{O}\left ({10}^4\right )-\mathscr{O}\left ({10}^7\right)\,{M_\odot}$ before the general-relativistic Feynman-Chandrasekhar instability causes their dynamical collapse to black holes. These accreting dark star configurations avoid standard stellar nuclear- and weak-interaction evolution that would lead to their demise long before they reached this supermassive size. Remarkably, this mechanism for supermassive black hole (SMBH) genesis is relatively robust to initial dark star mass, formation epoch, accretion rate and its history. The SMBHs produced this way can serve as seeds for even larger SMBHs $({\gtrsim}10^9\,M_\odot)$ that have been discovered at high redshift. |
| title | Early Formation of Supermassive Black Holes via Dark Star Gravitational Instability |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2511.08578 |