Did NANOGrav see a signal from primordial black hole formation?
arXiv:2009.07832 · doi:10.1103/PhysRevLett.126.051303
Abstract
We show that the recent NANOGrav result can be interpreted as a stochastic gravitational wave signal associated to formation of primordial black holes from high-amplitude curvature perturbations. The indicated amplitude and power of the gravitational wave spectrum agrees well with formation of primordial seeds for supermassive black holes.
7 pages, 4 figures. Minor corrections, results unchanged