8.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universitat de BarcelonaES1.4k papers
- Institució Catalana de Recerca i Estudis AvançatsES380 papers
- Centre National de la Recherche ScientifiqueFR378 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR257 papers
- Consejo Superior de Investigaciones CientíficasES235 papers
- University of CambridgeGB232 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PadovaIT228 papers
- University of EdinburghGB225 papers
- University of OxfordGB223 papers
- University of GroningenNL220 papers
- Aix-Marseille UniversitéFR215 papers
- Institute for High Energy PhysicsES212 papers
85 papers · 1 filter
Rethinking Resonance Detectability during Binary Neutron Star Inspiral: Accurate Mismatch Computations for Low-lying Dynamical Tides
Alberto Revilla-Peña, Ruxandra Bondarescu, Andrew P. Lundgren +1
We compute deviations from observed gravitational wave signals, where the amplitude of the signal is unchanged. As an example, we consider the detectability of low lying dynamical…
Probing cosmic strings via gravitational-wave lensing
Oleg Bulashenko, Nino Villanueva, Roberto Bada Nerin +1
We present a framework for detecting gravitational-wave signals lensed by cosmic strings (CSs), addressing a key gap in current searches. CSs, whose detection would provide a uniqu…
Saturation of Chaos Bound in a Phenomenological Rotating Black Hole--Effective Matter System at Low-Temperature Limit
Reza Pourkhodabakhshi
We study the chaotic behavior of a phenomenological system of rotating black holes (BHs) surrounded by radiation, dust, and dark matter as effective matter fluids. We show that the…
GW230814: investigation of a loud gravitational-wave signal observed with a single detector
The LIGO Scientific Collaboration, The Virgo Collaboration, The Kagra Collaboration +1783
GW230814, detected by the LIGO Livingston observatory with a signal-to-noise ratio of 42.4, represents the loudest gravitational-wave signal in the GWTC-4.0 catalog. Its source is…
Probing Binary Lens Caustics with Gravitational Waves: A Uniform Approximation Approach
Anna Moreso Serra, Oleg Bulashenko
We present a new framework for modeling gravitational wave diffraction near fold caustics using the Uniform Approximation (UA), focusing on binary mass lenses - axially asymmetric…
Parameter estimation of microlensed gravitational waves with Conditional Variational Autoencoders
Roberto Bada-Nerin, Oleg Bulashenko, Osvaldo Gramaxo Freitas +1
Gravitational lensing of gravitational waves (GWs) provides a unique opportunity to study cosmology and astrophysics at multiple scales. Detecting microlensing signatures, in parti…
Dynamical time and Ashtekar variables for the Husain-Kuchař model
J. Fernando Barbero G., Juan Margalef-Bentabol, Aitor Vicente-Cano +1
The relation between the Husain-Kuchař model and some extensions thereof that incorporate a dynamical time variable is explored. To this end, we rely on the geometric approach to t…
Analytical thresholds for black hole formation in general cosmological backgrounds
Albert Escrivà, Cristiano Germani, Ravi K. Sheth
We consider black holes which form from an initially spherically symmetric super-Hubble perturbation of a cosmological background filled by a perfect fluid with $w\in (0,1]…
Precursory collapse in Neutron Star-Black Hole mergers
Roberto Emparan, Daniel Marin
We investigate the properties of the event horizon in the merger between a large black hole and a smaller neutron star. We find that, if the star is compact enough, then, in its re…
Quantum Anomalies in String-Inspired Running Vacuum Universe: Inflation and Axion Dark Matter
Spyros Basilakos, Nick E. Mavromatos, Joan Sola
In this letter, we elaborate further on a Cosmological "Running-Vacuum" type model for the Universe, suggested previously by the authors within the context of a string-inspired eff…
Prospects for Fundamental Physics with LISA
Enrico Barausse, Emanuele Berti, Thomas Hertog +318
In this paper, which is of programmatic rather than quantitative nature, we aim to further delineate and sharpen the future potential of the LISA mission in the area of fundamental…
Dwarf Galaxies without Dark Matter: constraints on Modified Gravity
Ali Rida Khalifeh, Raul Jimenez
The discovery of dwarf galaxies without dark matter provides, counter-intuitively, strong support for the CDM standard model of cosmology. Their presence is well accommodat…
Measuring with pulsar timing arrays
Domènec Espriu, Luciano Gabbanelli, Marc Rodoreda
Pulsar Timing Arrays have yet to convincingly observe gravitational waves. Some time ago it was pointed out by one of the authors that a dramatic enhancement of the signal would ta…
A universal threshold for primordial black hole formation
Albert Escrivà, Cristiano Germani, Ravi K. Sheth
In this letter, we argue and show numerically that the threshold to form primordial black holes from an initial spherically symmetric perturbation is, to an excellent approximation…
Simulation of primordial black hole formation using pseudo-spectral methods
Albert Escrivà
In this work we have used for the first time pseudo-spectral methods to perform numerical simulations of spherically symmetric black hole formations on a Friedman-Robertson-Walker…
Challenges to global solutions in Horndeski's theory
Laura Bernard, Luis Lehner, Raimon Luna
We explore the question of obtaining global solutions in Horndeski's theories of gravity. Towards this end, we study a relevant set of the theory and, by employing the Einstein fra…
Scalar Field Theory Description of the Running Vacuum Model: the Vacuumon
Spyros Basilakos, Nick E. Mavromatos, Joan Sola
We investigate the running vacuum model (RVM) in the framework of scalar field theory.This dynamical vacuum model provides an elegant global explanation of the cosmic history, name…
Exotic compact objects with soft hair
Guilherme Raposo, Paolo Pani, Roberto Emparan
Motivated by the lack of a general parametrization for exotic compact objects, we construct a class of perturbative solutions valid for small (but otherwise generic) multipolar dev…
Black holes and binary mergers in scalar Gauss-Bonnet gravity: scalar field dynamics
Helvi Witek, Leonardo Gualtieri, Paolo Pani +1
We study the nonlinear dynamics of black holes that carry scalar hair and binaries composed of such black holes. The scalar hair is due to a linear or exponential coupling between…
Observers with constant proper acceleration, constant proper jerk, and beyond
Josep M. Pons, Ferran de Palol
We discuss in Minkowski spacetime the differences between the concepts of constant proper -acceleration and of vanishing -acceleration. By -acceleration we essentially…
Self-similarity in Einstein-Maxwell-dilaton theories and critical collapse
Jorge V. Rocha, Marija Tomašević
We study continuously self-similar solutions of four-dimensional Einstein-Maxwell-dilaton theory, with an arbitrary dilaton coupling. Self-similarity is an emergent symmetry of gra…
Strong cosmic censorship: The nonlinear story
Raimon Luna, Miguel Zilhão, Vitor Cardoso +2
A satisfactory formulation of the laws of physics entails that the future evolution of a physical system should be determined from appropriate initial conditions. The existence of…
Brans-Dicke cosmology mimicking running vacuum
Javier de Cruz Perez, Joan Sola
Brans-Dicke (BD) cosmology is reconsidered from an approach in which the model can be formulated in CDM form, but at the expense of replacing the rigid cosmological constant …
Threshold for primordial black holes: Dependence on the shape of the cosmological perturbations
Ilia Musco
Primordial black holes may have formed in the radiative era of the early Universe from the collapse of large enough amplitude perturbations of the metric. These correspond to non l…