Aspects of primordial black hole in the light of gravitational wave

 
分類宇宙物理セミナー
開始2019/10/11 (金) 16:00
終了2019/10/11 (金) 17:00
会場4号館3階345室
講演者多田祐一郎(名古屋大学)
言語
連絡先素核研・長谷川(5341)
ウェブサイト
食堂・売店/0

概要

Since Carr and Hawking proposed it more than 4 decades ago, primordial black hole (PBH) has attracted people and is increasing its importance more recently. It can explain ubiquitous massive BHs for LIGO/Virgo events, the main component of dark matters, etc.

The key point is that, once abundant PBHs are required, it might change the ”naturalness” of inflation: the small scale perturbations are free from the CMB scale and might have a large amplitudes. In such a case, stochastic gravitational waves (GWs) induced by the large density perturbations get important. They are not just an evidence of large perturbations but also can carry the information of phase transitions in the universe such as QCD and/or EW.

In this talk, I will introduce the astrophysical motivations of PBH, its implication to theories of inflation, and future possibilities in the light of stochastic GWs.

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