Did NANOGrav see a signal from primordial black hole formation?

TL;DR

This paper suggests that the recent NANOGrav gravitational wave detection may originate from primordial black hole formation, linking observed signals to early universe phenomena and supermassive black hole seeds.

Contribution

It provides a novel interpretation of NANOGrav data as gravitational waves from primordial black hole formation, connecting observational data with early universe models.

Findings

NANOGrav signal can be explained by primordial black hole formation.

The gravitational wave spectrum matches predictions for supermassive black hole seeds.

Supports the hypothesis of high-amplitude curvature perturbations in the early universe.

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.