Publications by authors named "Antonio J Iovino"
Article Synopsis
- * Our findings show that the critical compaction threshold needed for black hole formation closely matches the threshold for the first unstable circular orbit in a spherically symmetric setting.
- * We also discovered that the critical exponent related to primordial black hole mass near this threshold is determined by the inverse of the Lyapunov coefficient of the unstable orbits during a self-similar phase close to criticality.
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 accompanied by a sizable primordial black hole (PBH) abundance. We improve existing analyses and show that PBH overproduction disfavors Gaussian scenarios for scalar-induced GWs at 2σ and single-field inflationary scenarios, accounting for non-Gaussianity, at 3σ as the explanation of the most constraining NANOGrav 15-year data.
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