2017 Fiscal Year Final Research Report
Formation of Primordial Black Holes in the Matter-Dominated Era of the Universe
| Project/Area Number |
26400282
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Rikkyo University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Keywords | 原始ブラックホール / 初期宇宙 / 一般相対論 / インフレーション理論 / ブラックホール |
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| Outline of Final Research Achievements |
In the formation of primordial black holes in the matter-dominated era of the Universe, it is nonspherical effects that play most important roles. The main results of this project are the following: (1) We have constructed the model of nonspherical formation of primordial black hole with pressure-free fluid using the exact spacetime solution of the Einstein equation. (2) We have estimated the production probability of primordial black holes in the matter-dominated era under the suppression due to anisotropy in gravitational collapse. (3) We have estimated the production probability of primordial black holes in the matter-dominated era and the spin distribution of formed primordial black holes under the suppression due to anisotropy and angular momentum in gravitational collapse. With these results, we can now discuss primordial black holes formed in the matter-dominated era qualitatively with more accruracy and more reliability.
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| Free Research Field |
宇宙物理学
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