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 |
Section | 一般 |
Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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Research Institution | Rikkyo University |
Principal Investigator |
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Project Period (FY) |
2014-04-01 – 2018-03-31
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Project Status |
Completed (Fiscal Year 2017)
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Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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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 / 重力崩壊 / 膨張宇宙 / インフレーション宇宙論 / 宇宙論的揺らぎ / 原始密度ゆらぎ |
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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Report
(5 results)
Research Products
(50 results)
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[Journal Article] On the stability of a superspinar2018
Author(s)
Nen-ichi Nakao, Pankaj S. Joshi, Jun-Qi Guo, Prashant Kocherlakota, Hideyuki Tagoshi, Tomohiro Harada, Mandar Patil, Andrzej Krolak
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Journal Title
Physics Letter B
Volume: 780
Pages: 410-413
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] 漸近的準一様解について2014
Author(s)
原田知広(立教大)、柳哲文(名大)
Organizer
日本物理学会2014年秋季大会
Place of Presentation
佐賀大学(佐賀県佐賀市)
Year and Date
2014-09-21
Related Report
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