The latest results from Pulsar Timing Arrays: strong evidence for gravitational wave at very low frequency

par Antoine Petiteau (CEA/IRFU/DPhP)

lundi 10 juil. 2023, 11:00 → 12:30 Europe/Paris

André Berthelot (CEA Paris-Saclay)

On the 29th June, the collaborations EPTA (Europe), NANOGrav (US), PPTA (Australia) and CPTA (China) simultaneously announced independent results from the analysis of decades of pulsar observations. These results provide a strong evidence for the existence of gravitational waves at very low frequency, in the nanoHertz band.
In this seminar, the timing of pulsar will be presented, followed by the construction of an array forming a galactic scale detector for gravitational waves. Analysis and  results will be described, with a particular focus on EPTA results. Finally, the first interpretations will be presented as well as future prospects with the combination of all PTAs data within the IPTA (International PTA) collaboration and the SKA.

 

zoom link: https://cern.zoom.us/j/68399739111?pwd=SGErcHBQYmVLWFZTVE9jdm5xSmdEdz09

Petiteau_PTAResults2023_DPhP_230710.pdf