Speaker
Prof.
Pi Shi
(ITP-CAS)
Description
I will briefly review the recent progress in the primordial black hole (PBH) and the scalar-induced gravitational wave (IGW). I will introduce how to construct a gauge-independent observable at second order, which removes the gauge ambiguity in such waves. I will briefly discuss the non-Gaussianity generated on superhorizon scales, which affect the crosscheck of PBH abundance and IGW amplitude. As an example, a population of planet-mass PBHs can interpret the microlensing events reported by Subaru-HSC and AMPM, which is also consistent with the nanohertz stochastic GW background found by PTAs.
Primary author
Prof.
Pi Shi
(ITP-CAS)
