38 citations · 102 across the 9 of their papers we have counts for
10 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…
ACT stands for Awkward Cosmology Theories
Loris Del Grosso, Alfredo Urbano, Marcello Ziccolella
Recent Atacama Cosmology Telescope (ACT) observations, combined with Planck, favor a scalar spectral index in tension with Starobinsky inflation. Two main strategies have been prop…
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…
Off-Equatorial Orbits around Magnetically Charged Black Holes
Xilai Li, Loris Del Grosso, David E. Kaplan
We present a complete characterization of stable, off-equatorial circular orbits around magnetically charged black holes (MBHs). For a static, spherically symmetric MBH, we derive…
Cosmological Consequences of Unconstrained Gravity and Electromagnetism
Loris Del Grosso, David E Kaplan, Tom Melia +3
Motivated by the quantum description of gauge theories, we study the cosmological effects of relaxing the Hamiltonian and momentum constraints in general relativity and Gauss' law…
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…
Compact objects in and beyond the Standard Model from non-perturbative vacuum scalarization
Loris Del Grosso, Paolo Pani, Alfredo Urbano
We consider a theory in which a real scalar field is Yukawa-coupled to a fermion and has a potential with two non-degenerate vacua. If the coupling is sufficiently strong, a collec…
Fermion Soliton Stars with Asymmetric Vacua
L. Del Grosso, P. Pani
Fermion soliton stars are a motivated model of exotic compact objects in which a nonlinear self-interacting real scalar field couples to a fermion via a Yukawa term, giving rise to…
Fermion soliton stars
L. Del Grosso, G. Franciolini, P. Pani +1
A real scalar field coupled to a fermion via a Yukawa term can evade no-go theorems preventing solitonic solutions. For the first time, we study this model within General Relativit…