Primordial Black Holes: Formation, Spin and Type II
Primordial black holes (PBHs) may have formed through the gravitational collapse of cosmological perturbations that were generated and stretched during the inflationary era, later entering the cosmological horizon during the decelerating phase, if their amplitudes were sufficiently large. In this re...
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MDPI AG
2024-11-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/10/12/444 |
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| author | Tomohiro Harada |
| author_facet | Tomohiro Harada |
| author_sort | Tomohiro Harada |
| collection | DOAJ |
| description | Primordial black holes (PBHs) may have formed through the gravitational collapse of cosmological perturbations that were generated and stretched during the inflationary era, later entering the cosmological horizon during the decelerating phase, if their amplitudes were sufficiently large. In this review paper, we will briefly introduce the basic concept of PBHs and review the formation dynamics through this mechanism, the estimation of the initial spins of PBHs and the time evolution of type II fluctuations, with a focus on the radiation-dominated and (early) matter-dominated phases. |
| format | Article |
| id | doaj-art-3cc9209087d94feabf9ae6f6bfcaea6c |
| institution | DOAJ |
| issn | 2218-1997 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj-art-3cc9209087d94feabf9ae6f6bfcaea6c2025-08-20T02:39:41ZengMDPI AGUniverse2218-19972024-11-01101244410.3390/universe10120444Primordial Black Holes: Formation, Spin and Type IITomohiro Harada0Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, JapanPrimordial black holes (PBHs) may have formed through the gravitational collapse of cosmological perturbations that were generated and stretched during the inflationary era, later entering the cosmological horizon during the decelerating phase, if their amplitudes were sufficiently large. In this review paper, we will briefly introduce the basic concept of PBHs and review the formation dynamics through this mechanism, the estimation of the initial spins of PBHs and the time evolution of type II fluctuations, with a focus on the radiation-dominated and (early) matter-dominated phases.https://www.mdpi.com/2218-1997/10/12/444black holesearly universegeneral relativity |
| spellingShingle | Tomohiro Harada Primordial Black Holes: Formation, Spin and Type II Universe black holes early universe general relativity |
| title | Primordial Black Holes: Formation, Spin and Type II |
| title_full | Primordial Black Holes: Formation, Spin and Type II |
| title_fullStr | Primordial Black Holes: Formation, Spin and Type II |
| title_full_unstemmed | Primordial Black Holes: Formation, Spin and Type II |
| title_short | Primordial Black Holes: Formation, Spin and Type II |
| title_sort | primordial black holes formation spin and type ii |
| topic | black holes early universe general relativity |
| url | https://www.mdpi.com/2218-1997/10/12/444 |
| work_keys_str_mv | AT tomohiroharada primordialblackholesformationspinandtypeii |