IPMU Colloquium

Speaker: Shi Pi (Kavli IPMU)
Title: Stochastic gravitational waves background: Recent developments (Postdoc Colloquium)
Date (JST): Fri, Oct 16, 2020, 15:30 - 16:00
Place: Zoom
Related File: 2582.pdf
Abstract: Our universe is fulfilled by stochastic gravitational wave background (SGWB) with a large range of frequencies, which may have various astrophysical/cosmological origins in the early universe. In this talk I will briefly review the SGWB induced by the scalar perturbation, as well as its connection to the primordial black holes (PBHs). Last month, NANOGrav reported the discovery of a common-spectrum time residuals in their 12.5-yr data of pulsar timing array, which might be the first detection of such SGWB. I will show that this signal is connected to the planet-mass PBH candidates found by OGLE recently, if there is a dust-like stage before late-time reheating.
Remarks: IPMU Postdoc Colloquium Series 4
Registration necessary from here: https://ipmu.zoom.us/webinar/register/WN_SiQNqIjNSfCUiA0na9o58g