317 citations · 1.2k across the 29 of their papers we have counts for
30 papers
Stochastic gravitational-wave background from subsolar neutron stars in collapsar disks
Valerio De Luca, Loris Del Grosso, Emanuele Berti
The fragmentation of the neutrino-cooled accretion disks that surround the black holes formed in collapsars has recently been proposed as an astrophysical channel for the productio…
Gravitational wave signatures of subsolar neutron star formation in collapsar disks
Vishal Baibhav, Valerio De Luca, Loris Del Grosso +3
Standard models for stellar core collapse predict the birth of neutron stars with masses exceeding a solar mass. In the collapsar model, a rapidly rotating massive star collapses t…
Dynamical tidal response of neutron stars: From effective field theory to gravitational waveforms
Thomas Apostolidis, Valerio De Luca, Leonardo Gualtieri +3
We investigate the fully relativistic dynamical tidal response of neutron stars up to second order in the frequency. Combining the worldline effective field theory for extended gra…
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…
Tidal deformability of black holes surrounded by thin accretion disks
Enrico Cannizzaro, Valerio De Luca, Paolo Pani
The tidal Love numbers of self-gravitating compact objects describe their response to external tidal perturbations, such as those from a companion in a binary system, offering valu…
Flea on the elephant: Tidal Love numbers in subsolar primordial black hole searches
Valerio De Luca, Gabriele Franciolini, Antonio Riotto
Detecting subsolar objects in black hole binary mergers is considered a smoking gun signature of primordial black holes. Their supposedly vanishing tidal Love number is generically…
Tidal Love numbers and Green's functions in black hole spacetimes
Valerio De Luca, Alice Garoffolo, Justin Khoury +1
Tidal interactions play a crucial role in deciphering gravitational wave signals emitted by the coalescence of binary systems. They are usually quantified by a set of complex coeff…
Tidal Love numbers and approximate universal relations for fermion soliton stars
Emanuele Berti, Valerio De Luca, Loris Del Grosso +1
Fermion soliton stars are a consistent model of exotic compact objects which involve a nonlinear interaction between a real scalar field and fermions through a Yukawa term. This in…
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…
Non-linearities in the tidal Love numbers of black holes
Valerio De Luca, Justin Khoury, Sam S. C. Wong
Tidal Love numbers describe the linear response of a compact object under the presence of external tidal perturbations, and they are found to vanish exactly for black holes within…
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…
Modelling frequency-dependent tidal deformability for environmental black-hole mergers
Valerio De Luca, Andrea Maselli, Paolo Pani
Motivated by events in which black holes can lose their environment due to tidal interactions in a binary system, we develop a waveform model in which the tidal deformability inter…
Implications of the Weak Gravity Conjecture for Tidal Love Numbers of Black Holes
Valerio De Luca, Justin Khoury, Sam S. C. Wong
The Weak Gravity Conjecture indicates that extremal black holes in the low energy effective field theory should be able to decay. This criterion gives rise to non-trivial constrain…
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…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
On the Cosmological Stability of the Higgs Instability
Valerio De Luca, Alex Kehagias, Antonio Riotto
The Standard Model Higgs potential becomes unstable at large Higgs field values where its quartic coupling becomes negative. While the tunneling lifetime of our current electroweak…
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…