742 citations · 4.3k across the 89 of their papers we have counts for
91 papers
Scalar-Assisted Growth of Supermassive Black Holes: Boson-Mass Windows and Observational Constraints
Jorge Castelo Mourelle, Darío Núñez Zúñiga, Saeed Fakhry +1
We study a phenomenological cosmological model of black-hole growth in which a finite baryonic reservoir and a bosonic scalar cloud feed the black hole simultaneously. The baryonic…
Dark-to-black super-accretion as a spin-imprinting mechanism for supermassive Kerr black holes
Saeed Fakhry, Nicolas Sanchis-Gual, Jorge Castelo Mourelle +2
The existence of supermassive black holes with masses and large dimensionless spins at high redshift remains a challenge to our understand…
Advanced Virgo during the LIGO-Virgo-KAGRA fourth observing run
Virgo Collaboration, F Acernese, A Agapito +546
From April 10, 2024 to November 18, 2025 Advanced Virgo participated in the fourth observing run of the network of gravitational-wave detectors, together with Advanced LIGO and KAG…
Rotating Fermion-Boson Stars in -squared Gravity
Saeed Fakhry, Jorge Castelo Mourelle, Nicolas Sanchis-Gual +3
Fermion-boson stars are compact equilibrium configurations composed of ordinary fermionic matter and a bosonic dark component interacting only through gravity. Such systems provide…
Intrinsic handedness in O1-O4a black-hole mergers: probing orbital precession, remnant retention in dense environments and cosmological mirror asymmetry
Juan Calderón Bustillo, Adrián del Rio, Nicolás Sanchis-Gual +1
Precessing binary black-holes generically produce an imbalance of right- and left- handed gravitational waves, reflecting the breaking of mirror symmetry by the merger dynamics. We…
Relativistic and Newtonian Proca Stars: A Tale of Two Limits
Alberto Diez-Tejedor, Carlos Herdeiro, Claudio Lazarte +4
We investigate a representative set of static solitonic solutions of the Einstein-Proca theory in the Newtonian regime, where the field frequency approaches the particle mass, $ω\t…
Constraint-satisfying binary boson star initial data via XCFC
Gabriele Palloni, Nicolas Sanchis-Gual, José A. Font +4
Numerical-relativity simulations with non-trivial matter configurations require initial data that satisfy the Hamiltonian and momentum constraints of the Einstein equations. We con…
Multipolar Proca stars: electric, magnetic and hybrid solitons
Carlos Herdeiro, Eugen Radu, Etevaldo dos Santos Costa Filho +1
We construct new families of everywhere regular, asymptotically flat solitons in the Einstein--Proca model, obtained as self-gravitating continuations of flat-spacetime (singular)…
Advanced Virgo Plus for O5 -- Design Report Overview
F. Acernese, A. Agapito, D. Agarwal +578
This document presents an overview of the design, implementation, and expected performance of the Advanced Virgo Plus (AdV+) upgrades in view of the O5 observing run. Following the…
Gravitational confinement of ghost scalar fields in neutron stars
Argelia Bernal, Víctor Jaramillo, Néstor A. Montiel-Hernández +2
We investigate the effects, stability, and nonlinear dynamics of ghost scalar matter modeled as a field with a negative kinetic term confined within the cores of neutron stars. To…
Gravitational synchronization in bosonic dark matter admixed neutron stars
Claudio Lazarte, Nicolas Sanchis-Gual, José A. Font
While the search for dark matter remains a central focus of modern astrophysics and high-energy physics, neutron stars could provide natural laboratories in which the interaction b…
Improving the inference of the stellar quantities using the extended -Love-- relations
Eneko Aranguren, José A. Font, Nicolas Sanchis-Gual +1
In relativistic Astrophysics the -Love- relations refer to approximately EoS-independent relations involving the moment of inertia, Love number, and quadrupole moment through…
Testing bosonic dark matter through white dwarf mass measurements
Jorge Castelo Mourelle, Nicolas Sanchis-Gual, José A. Font +1
Mass estimates of white dwarfs via electromagnetic methods, often differ from those obtained through gravitational redshift measurements, in some cases with discrepancies ranging i…
Dark-to-black super accretion as a mechanism for early supermassive black hole growth
Nicolas Sanchis-Gual, Juan Barranco, Juan Carlos Degollado +1
The discovery of supermassive black holes with masses at redshifts challenges conventional formation scenarios based on baryonic accretion and…
Non-linear stability analysis of -Proca stars
Claudio Lazarte, Nicolas Sanchis-Gual, José A. Font +1
Vector boson stars, also known as Proca stars, exhibit remarkable dynamical robustness, making them strong candidates for potential astrophysical exotic compact objects. In search…
Reducing the irreducible: the charged black hole bomb in a moving cavity
Nicolas Sanchis-Gual, Alejandro Belchí, Carlos Herdeiro +1
We revisit the charged black hole bomb by numerically solving the fully non-linear Einstein-Maxwell-(charged, complex) Klein-Gordon system with a moving mirror. By dynamically vary…
Stability and collisions of excited spherical boson stars: glimpses of chains and rings
Marco Brito, Carlos Herdeiro, Eugen Radu +2
Scalar, spherically symmetric, radially excited boson stars were previously shown to be stabilized, against spherical dynamics, by sufficiently strong self-interactions. Here, we f…
Cosmological mirror symmetry and gravitational-wave helicity
Juan Calderón-Bustillo, Adrian del Rio, Samson H. W. Leong +1
Our current understanding of the Universe relies on the hypothesis that, when observed at sufficiently large scales, it looks statistically identical regardless of location or dire…
Reproducing galactic rotation curves with a two-component bosonic dark matter model
Jorge Castelo Mourelle, Nicolas Sanchis-Gual, José A. Font
Bosonic stars,hypothetical astrophysical entities, are generally categorized into two primary classes based on the nature of their constituent particles: Einstein Klein Gordon star…
Eccentric mergers of binary Proca stars
Gabriele Palloni, Nicolas Sanchis-Gual, José A. Font +2
We present a numerical relativity study of eccentric mergers of equal-mass rotating Proca stars, focusing on their gravitational-wave (GW) emission. By systematically va…
The Science of the Einstein Telescope
Adrian Abac, Raul Abramo, Simone Albanesi +485
Einstein Telescope (ET) is the European project for a gravitational-wave (GW) observatory of third-generation. In this paper we present a comprehensive discussion of its science ob…
Gravitational-wave signatures of mirror (a)symmetry in binary black hole mergers: measurability and correlation to gravitational-wave recoil
Samson H. W. Leong, Alejandro Florido Tomé, Juan Calderón Bustillo +2
Precessing binary black-hole mergers can produce a net flux of circularly-polarized gravitational waves. This imbalance between left- and right-handed circularly polarized waves, q…
-Love-, and too: The role of the mass in universal relations of compact stars
Eneko Aranguren, José A. Font, Nicolas Sanchis-Gual +1
In the study of rotating neutron stars the -Love- relations refer to the existence of various approximate, equation of state-independent relations involving the moment of ine…
Exotic compact objects: a recent numerical-relativity perspective
Miguel Bezares, Nicolas Sanchis-Gual
Beyond black holes and neutron stars, new hypothetical compact objects have been proposed as potential astrophysical entities. In general, their properties have not yet been fully…