| 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 |
