Speaker
Sonali Verma
(ULB Brussels)
Description
In this talk, I will discuss how pulsar timing arrays (PTA) can probe primordial black holes (PBH) through gravitational waves. If PBHs exist, they can form in the early universe from the collapse of large density perturbations, necessarily triggering a background of secondary-order scalar-induced gravitational waves. In the late universe, these PBHs will form clusters, leading to enhanced PBH binary merger rates that can also contribute to a gravitational wave background. Additionally, I will discuss the parameter space favored by the latest PTA data release for this model and its physical implications.
Primary authors
Sebastien Clesse
(ULB Brussels)
Sonali Verma
(ULB Brussels)
Virgile Dandoy
(ULB Brussels)
