47 citations · 47 across the 4 of their papers we have counts for
15 papers
Memoirs of the curvaton: non-perturbative non-Gaussianity and supermassive primordial black holes
S. Allegrini, A. J. Iovino, G. Perna +1
The curvaton provides a simple mechanism for generating strongly non-Gaussian curvature perturbations after inflation, with potentially important consequences on small scales. We s…
Synergies Between Pulsar Timing Array and Astrometry
Gabriele Perna, Nicola Bellomo, Daniele Bertacca
The presence of a gravitational wave background can be established not only via exquisitely precise pulsar timing array (PTA) measurements, but also via astrometric observations. I…
Exploring Gravitational Wave Signatures Due to Primordial Non-gaussianity and Large Scale Structure Using SKAO
H. V. Ragavendra, Giulia Capurri, Alina Mierna +8
This chapter explores theoretical and observational strategies to use the stochastic gravitational-wave background detectable by Square Kilometre Array Observatory (SKAO) as a prob…
Curbing PBHs with PTAs
A. J. Iovino, G. Perna, A. Riotto +1
Sizeable primordial curvature perturbations needed to seed a population of primordial black holes (PBHs) will be accompanied by a scalar-induced gravitational wave signal that can…
Probing non-Gaussianity during reheating with SIGW in the LISA band
Gabriele Perna, Guillem Domènech
We analyse the effects of a non-standard evolution of the Universe during the reheating epoch on the spectrum of scalar-induced gravitational waves (SIGWs) accounting for the prese…
Quantum production of gravitational waves after inflation
Alina Mierna, Gabriele Perna, Sabino Matarrese +2
A variety of mechanisms in the early Universe lead to the generation of gravitational waves (GWs). We introduce here a novel source of GWs generated by vacuum fluctuations after in…