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The Formation Probability of Primordial Black Holes
Matteo Biagetti, Valerio De Luca, Gabriele Franciolini +2
We calculate the exact formation probability of primordial black holes generated during the collapse at horizon re-entry of large fluctuations produced during inflation, such as th…
The Threshold for Primordial Black Hole Formation: a Simple Analytic Prescription
Ilia Musco, Valerio De Luca, Gabriele Franciolini +1
Primordial black holes could have been formed in the early universe from non linear cosmological perturbations re-entering the cosmological horizon when the Universe was still radi…
The Clustering Evolution of Primordial Black Holes
V. De Luca, V. Desjacques, G. Franciolini +1
Primordial black holes might comprise a significant fraction of the dark matter in the Universe and be responsible for the gravitational wave signals from black hole mergers observ…
NANOGrav Hints to Primordial Black Holes as Dark Matter
V. De Luca, G. Franciolini, A. Riotto
The NANOGrav Collaboration has recently published a strong evidence for a stochastic common-spectrum process that may be interpreted as a stochastic gravitational wave background.…
The Importance of Priors on LIGO-Virgo Parameter Estimation: the Case of Primordial Black Holes
S. Bhagwat, V. De Luca, G. Franciolini +2
The black holes detected by current and future interferometers can have diverse origins. Their expected mass and spin distributions depend on the specifics of the formation mechani…
Primordial Black Holes Confront LIGO/Virgo data: Current situation
V. De Luca, G. Franciolini, P. Pani +1
The LIGO and Virgo Interferometers have so far provided 11 gravitational-wave (GW) observations of black-hole binaries. Similar detections are bound to become very frequent in the…
The Evolution of Primordial Black Holes and their Final Observable Spins
V. De Luca, G. Franciolini, P. Pani +1
Primordial black holes in the mass range of ground-based gravitational-wave detectors can comprise a significant fraction of the dark matter. Mass and spin measurements from coales…
Constraints on Primordial Black Holes: the Importance of Accretion
V. De Luca, G. Franciolini, P. Pani +1
We consider the constraints on the fraction of dark matter in the universe in the form of primordial black holes taking into account the crucial role of accretion which may change…
On the Primordial Black Hole Mass Function for Broad Spectra
V. De Luca, G. Franciolini, A. Riotto
We elaborate on the mass function of primordial black holes in the case in which the power spectrum of the curvature perturbation is broad. For the case of a broad and flat spectru…
Gravitational Waves from Peaks
V. De Luca, V. Desjacques, G. Franciolini +1
We discuss a novel mechanism to generate gravitational waves in the early universe. A standard way to produce primordial black holes is to enhance at small-scales the overdensity p…
The Ineludible non-Gaussianity of the Primordial Black Hole Abundance
V. De Luca, G. Franciolini, A. Kehagias +3
We study the formation of primordial black holes when they are generated by the collapse of large overdensities in the early universe. Since the density contrast is related to the…
The Initial Spin Probability Distribution of Primordial Black Holes
V. De Luca, V. Desjacques, G. Franciolini +2
We study the spin of primordial black holes produced by the collapse of large inhomogeneities in the early universe. Since such primordial black holes originate from peaks, that is…
The Primordial Black Hole Dark Matter - LISA Serendipity
N. Bartolo, V. De Luca, G. Franciolini +3
There has recently been renewed interest in the possibility that the dark matter in the universe consists of primordial black holes (PBHs). Current observational constraints leave…