213 citations · 707 across the 27 of their papers we have counts for
4 papers · 1 filter
What is the source of the PTA GW signal?
John Ellis, Malcolm Fairbairn, Gabriele Franciolini +7
The most conservative interpretation of the nHz stochastic gravitational wave background (SGWB) discovered by NANOGrav and other Pulsar Timing Array (PTA) Collaborations is astroph…
Primordial black holes in the curvaton model: possible connections to pulsar timing arrays and dark matter
Giacomo Ferrante, Gabriele Franciolini, Antonio Junior Iovino +1
We revise primordial black holes (PBHs) production in the axion-curvaton model, in light of recent developments in the computation of their abundance accounting for non-gaussianiti…
The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities
Gabriele Franciolini, Antonio Junior Iovino, Ville Vaskonen +1
We study whether the signal seen by pulsar timing arrays (PTAs) may originate from gravitational waves (GWs) induced by large primordial perturbations. Such perturbations may be ac…
One loop to rule them all: Perturbativity in the presence of ultra slow-roll dynamics
Gabriele Franciolini, Antonio Junior Iovino, Marco Taoso +1
We discuss the issue of perturbativity in single-field inflationary models with a phase of ultra slow-roll (USR) tailor suited to generate an order-one abundance of primordial blac…