317 citations · 1.2k across the 29 of their papers we have counts for
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Primordial Black-Hole-Based Pathways to Little Red Dots
Valerio De Luca, Loris Del Grosso, Gabriele Franciolini +4
The James Webb Space Telescope has uncovered a population of compact, high-redshift sources, the Little Red Dots (LRDs), which may host supermassive black holes (BHs) significantly…
GW231123: A Possible Primordial Black Hole Origin
Valerio De Luca, Gabriele Franciolini, Antonio Riotto
GW231123, the heaviest binary black hole merger detected by the LIGO-Virgo-KAGRA Collaboration to date, lies in the pair-instability mass gap and exhibits unusually high component…
The accretion, emission, mass and spin evolution of primordial black holes
Valerio De Luca, Nicola Bellomo
Throughout the cosmic history, primordial black holes may experience an efficient phase of baryonic mass accretion from the surrounding medium. While the realm of accretion physics…
Dynamical friction in dark matter superfluids: The evolution of black hole binaries
Lasha Berezhiani, Giordano Cintia, Valerio De Luca +1
The theory of superfluid dark matter is characterized by self-interacting sub-eV particles that thermalize and condense to form a superfluid core in galaxies. Massive black holes a…
Primordial black holes and their gravitational-wave signatures
Eleni Bagui, Sebastien Clesse, Valerio De Luca +17
In the recent years, primordial black holes (PBHs) have emerged as one of the most interesting and hotly debated topics in cosmology. Among other possibilities, PBHs could explain…
How well do we know the primordial black hole abundance? The crucial role of nonlinearities when approaching the horizon
Valerio De Luca, Alex Kehagias, Antonio Riotto
We discuss the non-linear corrections entering in the calculation of the primordial black hole abundance from the non-linear radiation transfer function and the determination of th…
Superfluid Dark Matter around Black Holes
Valerio De Luca, Justin Khoury
Superfluid dark matter, consisting of self-interacting light particles that thermalize and condense to form a superfluid in galaxies, provides a novel theory that matches the succe…
Heavy primordial black holes from strongly clustered light black holes
Valerio De Luca, Gabriele Franciolini, Antonio Riotto
We show that heavy primordial black holes may originate from much lighter ones if the latter are strongly clustered at the time of their formation. While this population is subject…
Ruling out Initially Clustered Primordial Black Holes as Dark Matter
V. De Luca, G. Franciolini, A. Riotto +1
Combining constraints from microlensing and Lyman- forest, we provide a simple argument to show that large spatial clustering of stellar-mass primordial black holes at the time…
Signals from the Early Universe: Black Holes, Gravitational Waves and Particle Physics
Valerio De Luca
We dedicate this thesis to the study of signatures coming from the primordial epochs of the universe. We will focus in particular on Primordial Black Holes (PBHs), which may be for…
Probing Anisotropies of the Stochastic Gravitational Wave Background with LISA
Nicola Bartolo, Daniele Bertacca, Robert Caldwell +19
We investigate the sensitivity of the Laser Interferometer Space Antenna (LISA) to the anisotropies of the Stochastic Gravitational Wave Background (SGWB). We first discuss the mai…
A Note on the Abundance of Primordial Black Holes: Use and Misuse of the Metric Curvature Perturbation
V. De Luca, A. Riotto
The formation of Primordial Black Holes (PBHs) through the collapse of large fluctuations in the early universe is a rare event. This manifests itself, for instance, through the no…
Primordial Black Holes in Matter-Dominated Eras: the Role of Accretion
V. De Luca, G. Franciolini, A. Kehagias +2
We consider the role of secondary infall and accretion onto an initially overdense perturbation in matter-dominated eras, like the one which is likely to follow the end of inflatio…
The Minimum Testable Abundance of Primordial Black Holes at Future Gravitational-Wave Detectors
V. De Luca, G. Franciolini, P. Pani +1
The next generation of gravitational-wave experiments, such as Einstein Telescope, Cosmic Explorer and LISA, will test the primordial black hole scenario. We provide a forecast for…