Exponential early growth of primordial black holes through neutrino absorption in the radiation-dominated universe
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| Format: | Recurso digital |
| Langue: | anglais |
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2025
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| _version_ | 1866901622407299072 |
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| author | Yuri, Koshkin |
| author_facet | Yuri, Koshkin |
| contents | <p>This work proposes a novel mechanism for the exponential growth of primordial black holes (PBHs) in the early Universe, driven by the absorption of ultra-relativistic neutrinos shortly after their decoupling at t ~ 1 s. At this epoch, the cosmological neutrino density reached ~10⁷ kg/m³, and the geometric capture cross-section σ_geo = πR_s² leads to a nonlinear mass-growth law: dM/dt = A M², where A = 4πG²ρ_ν/c³. Preliminary estimates show that PBHs with initial masses as small as 10⁻³–1 M☉ can grow by many orders of magnitude within months or years, producing massive seeds (10³–10⁶ M☉) capable of explaining the JWST observations of supermassive black holes at z > 10. This mechanism bypasses Eddington limits and standard accretion scenarios, offering a natural solution to the puzzle of early SMBH formation. This preprint builds on earlier theoretical proposals regarding early black hole formation and provides the first quantitative estimate of neutrino-driven PBH growth.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_17633539 |
| institution | Zenodo |
| language | eng |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Exponential early growth of primordial black holes through neutrino absorption in the radiation-dominated universe Yuri, Koshkin primordial black holes, neutrino cosmology, early Universe, black hole growth, supermassive black holes, JWST, radiation-dominated era, neutrino absorption, PBH seeds, high-redshift quasars Astronomy Cosmology General relativity <p>This work proposes a novel mechanism for the exponential growth of primordial black holes (PBHs) in the early Universe, driven by the absorption of ultra-relativistic neutrinos shortly after their decoupling at t ~ 1 s. At this epoch, the cosmological neutrino density reached ~10⁷ kg/m³, and the geometric capture cross-section σ_geo = πR_s² leads to a nonlinear mass-growth law: dM/dt = A M², where A = 4πG²ρ_ν/c³. Preliminary estimates show that PBHs with initial masses as small as 10⁻³–1 M☉ can grow by many orders of magnitude within months or years, producing massive seeds (10³–10⁶ M☉) capable of explaining the JWST observations of supermassive black holes at z > 10. This mechanism bypasses Eddington limits and standard accretion scenarios, offering a natural solution to the puzzle of early SMBH formation. This preprint builds on earlier theoretical proposals regarding early black hole formation and provides the first quantitative estimate of neutrino-driven PBH growth.</p> |
| title | Exponential early growth of primordial black holes through neutrino absorption in the radiation-dominated universe |
| topic | primordial black holes, neutrino cosmology, early Universe, black hole growth, supermassive black holes, JWST, radiation-dominated era, neutrino absorption, PBH seeds, high-redshift quasars Astronomy Cosmology General relativity |
| url | https://doi.org/10.5281/zenodo.17633539 |