Title: Hunting for black holes with gravitational waves

Date & Time: Friday, November 20th, 2020, 11:00-12:00 AM
Location: Online
( https://zoom.us/j/6210767044?pwd=SkRuRzZtbjcwQkszS2g4QThiWVl3dz09 , It will open at 10:30)
Language: English
Speaker: Prof. Chunglee Kim (Ewha Womans University)

Abstract

The discovery of GW150914 showed some black holes do merge and the coalescence of a binary black hole can be "directly observable" with gravitational waves (GWs).
Although imaging is not possible with GW observation, masses of individual black holes in a binary can be measured by GW observation with impressive accuracy.
The distance to the source is also measurable and BBHs are suggested as 'standard sirens' for constraining a Hubble constant.
Stellar-mass BBHs are observable with km-scale laser interferometry in the GW frequency range of 10-2000 Hz.
Supermassive BBHs would be observable by precision timing of millisecond radio pulsars at nano Hertz frequencies of GW signals.
In this talk, I will give an overview on the second Gravitational-Wave Transient Catalog (GWTC-2) published in October, 2020 by the LIGO-Virgo collaboration and  the 11-yr efforts of the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) published in 2018.
I will also discuss the implications of BBH observations for the next decades.