Video URL
https://pirsa.org/25100042Pulsar Timing Arrays: a new window into the gravitational-wave sky
APA
Sato-Polito, G. (2025). Pulsar Timing Arrays: a new window into the gravitational-wave sky. Perimeter Institute for Theoretical Physics. https://pirsa.org/25100042
MLA
Sato-Polito, Gabriela. Pulsar Timing Arrays: a new window into the gravitational-wave sky. Perimeter Institute for Theoretical Physics, Oct. 01, 2025, https://pirsa.org/25100042
BibTex
@misc{ scivideos_PIRSA:25100042, doi = {10.48660/25100042}, url = {https://pirsa.org/25100042}, author = {Sato-Polito, Gabriela}, keywords = {Other Physics}, language = {en}, title = {Pulsar Timing Arrays: a new window into the gravitational-wave sky}, publisher = {Perimeter Institute for Theoretical Physics}, year = {2025}, month = {oct}, note = {PIRSA:25100042 see, \url{https://scivideos.org/index.php/pirsa/25100042}} }
Gabriela Sato-Polito Institute for Advanced Study (IAS) - School of Natural Sciences (SNS)
Abstract
Pulsar timing arrays (PTAs) consist of a set of regularly monitored millisecond pulsars with extremely stable rotational periods that are used as precise cosmic clocks. The arrival time of pulses can be altered by the passage of gravitational waves (GWs) between them and the Earth, thus serving as a galaxy-wide GW detector. Evidence for low-frequency (~nHz) gravitational waves has recently been reported for the first time across multiple PTA collaborations, opening a new observational window into the Universe. I will discuss how pulsar observations are used to measure GWs, what we are currently learning by mapping the nanohertz GW sky, and what lies ahead following a first detection.