| 日時: |
2013-12-03 11:00 - 12:00 |
| 場所: |
研究本館会議室１ |
| 会議名: |
Revealing the formation condition of primordial black holes by numerical simulations |
| 連絡先: |
野澤 真人、nozawam-AT-post.kek.jp |
| 講演者: |
中本 智弘 氏 (東京大学大学院理学系研究科付属ビックバン宇宙国際研究センター) |
| 講演言語: |
英語 |
| アブストラクト: |
Primordial black holes (PBHs) are an important tool in cosmology to probe the primordial spectrum of small-scale curvature perturbations that reenter the cosmological horizon during radiation domination epoch. We numerically solve the evolution of spherically symmetric highly perturbed configurations to clarify the criteria of PBHs formation using an extremely wide class of curvature profiles characterized by five parameters, (in contrast to only two parameters used in all previous papers) which specify the curvature profiles not only at the central region but also at the outer boundary of configurations. It is shown that formation or non-formation of PBHs is determined entirely by only two master parameters one of which can be presented as an integral of curvature over initial configurations and the other is presented in terms of the position of the core and the boundary. |
