José A. Font
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View article: Subgrid modelling of MRI-driven turbulence in differentially rotating neutron stars
Subgrid modelling of MRI-driven turbulence in differentially rotating neutron stars Open
Following a binary neutron star (BNS) merger, the transient remnant is often a fast spinning, differentially rotating, magnetized hypermassive neutron star (HMNS). This object is prone to the magnetorotational instability (MRI) which drive…
View article: Subgrid modelling of MRI-driven turbulence in differentially rotating neutron stars
Subgrid modelling of MRI-driven turbulence in differentially rotating neutron stars Open
Following a binary neutron star (BNS) merger, the transient remnant is often a fast-spinning, differentially rotating, magnetised hypermassive neutron star (HMNS). This object is prone to the magnetorotational instability (MRI) which drive…
View article: Non-linear stability analysis of $\ell$-Proca stars
Non-linear stability analysis of $\ell$-Proca stars Open
Vector boson stars, also known as Proca stars, exhibit remarkable dynamical robustness, making them strong candidates for potential astrophysical exotic compact objects. In search of theoretically well-motivated Proca star models, we recen…
View article: Assessment of normalizing flows for parameter estimation on time-frequency representations of gravitational-wave data
Assessment of normalizing flows for parameter estimation on time-frequency representations of gravitational-wave data Open
The speed-up of parameter estimation is an active field of research in gravitational-wave data analysis. In this paper we present GP12, a deep-learning method that merges residual networks and normalising flows into a general-purpose, imag…
View article: Electrical storm in patients with hypertrophic cardiomyopathy
Electrical storm in patients with hypertrophic cardiomyopathy Open
Background Data about ES in hypertrophic cardiomyopathy (HCM) patients are scarce and restricted to case reports and cases series, limiting the ability to optimize therapeutical strategy in such situation. We aimed at analyzing the acute m…
View article: Gravitational Waves from Neutron Stars: Detection Prospects and Inferences for Two Distinct Types of Remnants
Gravitational Waves from Neutron Stars: Detection Prospects and Inferences for Two Distinct Types of Remnants Open
The detection of gravitational waves from compact binary coalescences is impacting our knowledge of stellar-origin compact objects. In particular, gravitational waves from neutron stars encode key information about the nature of matter at …
View article: Eccentric mergers of binary Proca stars
Eccentric mergers of binary Proca stars Open
We present a numerical relativity study of eccentric mergers of equal-mass rotating $\bar m=1$ Proca stars, focusing on their gravitational-wave (GW) emission. By systematically varying key binary parameters, such as the initial orbital bo…
View article: Observing boson stars in binary systems: The case of Gaia BH1
Observing boson stars in binary systems: The case of Gaia BH1 Open
The Gaia experiment recently reported the observation of a binary system composed of a Sun-like star orbiting a dark compact object, known as Gaia BH1. The nature of the compact object remains uncertain. While the Gaia mission identifies i…
View article: Rapid detection of gravitational waves from binary black hole mergers using sparse dictionary learning
Rapid detection of gravitational waves from binary black hole mergers using sparse dictionary learning Open
Current gravitational wave (GW) detection pipelines for compact binary coalescence based on matched filtering have reported over 90 confident detections during the first three observing runs of the LIGO-Virgo-KAGRA (LVK) detector network. …
View article: A Deep Learning Powered Numerical Relativity Surrogate for Binary Black Hole Waveforms
A Deep Learning Powered Numerical Relativity Surrogate for Binary Black Hole Waveforms Open
Gravitational-wave approximants are essential for gravitational-wave astronomy, allowing the coverage binary black hole parameter space for inference or match filtering without costly numerical relativity (NR) simulations, but generally tr…
View article: Parameter estimation of microlensed gravitational waves with Conditional Variational Autoencoders
Parameter estimation of microlensed gravitational waves with Conditional Variational Autoencoders Open
Gravitational lensing of gravitational waves (GWs) provides a unique opportunity to study cosmology and astrophysics at multiple scales. Detecting microlensing signatures, in particular, requires efficient parameter estimation methods due …
View article: High-speed reconstruction of long-duration gravitational waves from extreme-mass-ratio inspirals using sparse dictionary learning
High-speed reconstruction of long-duration gravitational waves from extreme-mass-ratio inspirals using sparse dictionary learning Open
Measuring accurate long-duration gravitational waves from extreme mass ratio inspirals (EMRIs) could provide scientifically fruitful knowledge of massive black hole populations and robust tests for general relatively during the LISA missio…
View article: Deep-learning classification and parameter inference of rotational core-collapse supernovae
Deep-learning classification and parameter inference of rotational core-collapse supernovae Open
We test deep-learning (DL) techniques for the analysis of rotational core-collapse supernovae (CCSN) gravitational-wave (GW) signals by performing classification and parameter inference of the maximum (peak) frequency and the GW strain amp…
View article: Optically targeted search for gravitational waves emitted by core-collapse supernovae during the third observing run of Advanced LIGO and Advanced Virgo
Optically targeted search for gravitational waves emitted by core-collapse supernovae during the third observing run of Advanced LIGO and Advanced Virgo Open
We present the results from a search for gravitational-wave transients associated with core-collapse supernovae observed optically within 30 Mpc during the third observing run of Advanced LIGO and Advanced Virgo. No gravitational wave asso…
View article: $I$-Love-$Q$, and $δM$ too: The role of the mass in universal relations of compact stars
$I$-Love-$Q$, and $δM$ too: The role of the mass in universal relations of compact stars Open
In the study of rotating neutron stars the $I$-Love-$Q$ relations refer to the existence of various approximate, equation of state-independent relations involving the moment of inertia, the Love number and the quadrupole moment. These rela…
View article: Numerical relativity surrogate waveform models for exotic compact objects: The case of head-on mergers of equal-mass Proca stars
Numerical relativity surrogate waveform models for exotic compact objects: The case of head-on mergers of equal-mass Proca stars Open
We present several high-accuracy surrogate models for gravitational-wave\nsignals from equal-mass head-on mergers of Proca stars, computed through the\nNewman-Penrose scalar $\\psi_4$. We also discuss the current state of the model\nextens…
View article: High-speed reconstruction of long-duration gravitational waves from extreme mass ratio inspirals using sparse dictionary learning
High-speed reconstruction of long-duration gravitational waves from extreme mass ratio inspirals using sparse dictionary learning Open
Measuring accurate long-duration gravitational waves from extreme mass ratio inspirals (EMRIs) could provide scientifically fruitful knowledge of massive black hole populations and robust tests for general relatively during the LISA missio…
View article: Quasinormal Modes in Modified Gravity using Physics-Informed Neural Networks
Quasinormal Modes in Modified Gravity using Physics-Informed Neural Networks Open
In this paper, we apply a novel approach based on physics-informed neural networks to the computation of quasinormal modes of black hole solutions in modified gravity. In particular, we focus on the case of Einstein-scalar-Gauss-Bonnet the…
View article: Toward numerical-relativity informed effective-one-body waveforms for dynamical capture black hole binaries
Toward numerical-relativity informed effective-one-body waveforms for dynamical capture black hole binaries Open
Dynamical captures of black holes may take place in dense stellar media due to the emission of gravitational radiation during a close passage. Detection of such events requires detailed modeling, since their phenomenology qualitatively dif…
View article: Determining the core-collapse supernova explosion mechanism with current and future gravitational-wave observatories
Determining the core-collapse supernova explosion mechanism with current and future gravitational-wave observatories Open
Gravitational waves are emitted from deep within a core-collapse supernova, which may enable us to determine the mechanism of the explosion from a gravitational-wave detection. Previous studies suggested that it is possible to determine if…
View article: Deep-Learning Classification and Parameter Inference of Rotational Core-Collapse Supernovae
Deep-Learning Classification and Parameter Inference of Rotational Core-Collapse Supernovae Open
We test deep-learning (DL) techniques for the analysis of rotational core-collapse supernovae (CCSN) gravitational-wave (GW) signals by performing classification and parameter inference of the maximum (peak) frequency and the GW strain amp…
View article: Comparison of neural network architectures for feature extraction from binary black hole merger waveforms
Comparison of neural network architectures for feature extraction from binary black hole merger waveforms Open
We evaluate several neural-network architectures, both convolutional and recurrent, for gravitational-wave time-series feature extraction by performing point parameter estimation on noisy waveforms from binary-black-hole mergers. We build …
View article: Gravitational-wave imprints of non-convex dynamics in binary neutron star mergers
Gravitational-wave imprints of non-convex dynamics in binary neutron star mergers Open
Explaining gravitational-wave (GW) observations of binary neutron star (BNS) mergers requires an understanding of matter beyond nuclear saturation density. Our current knowledge of the properties of high-density matter relies on electromag…
View article: Identifying thermal effects in neutron star merger remnants with model-agnostic waveform reconstructions and third-generation detectors
Identifying thermal effects in neutron star merger remnants with model-agnostic waveform reconstructions and third-generation detectors Open
We probe the intrinsic differences in simulated gravitational-wave signals from binary neutron star (BNS) mergers, arising from varying approaches to incorporating thermal effects in numerical-relativity modeling. We consider a hybrid appr…
View article: Classification methods for noise transients in advanced gravitational-wave detectors II: Performance tests on Advanced LIGO data
Classification methods for noise transients in advanced gravitational-wave detectors II: Performance tests on Advanced LIGO data Open
The data taken by the advanced LIGO and Virgo gravitational-wave detectors contains short duration noise transients that limit the significance of astrophysical detections and reduce the duty cycle of the instruments. As the advanced detec…
View article: Gravitational-Wave Parameter Inference with the Newman-Penrose Scalar
Gravitational-Wave Parameter Inference with the Newman-Penrose Scalar Open
sponsorship: This research has made use of data or software obtained from the Gravitational Wave Open Science Center, a service of LIGO Laboratory, the LIGO Scientific Collaboration, the Virgo Collaboration, and KAGRA. LIGO Laboratory and …
View article: Searching for vector boson-star mergers within LIGO-Virgo intermediate-mass black-hole merger candidates
Searching for vector boson-star mergers within LIGO-Virgo intermediate-mass black-hole merger candidates Open
sponsorship: We thank Tom Callister and Kaze Wong for enlightening discussions about population studies and Xisco Jimenez Forteza for comments on the manuscript. The corner plots in Fig. 5 have been generated with the CORNER package [121].…
View article: Determining the core-collapse supernova explosion mechanism with current and future gravitational-wave observatories
Determining the core-collapse supernova explosion mechanism with current and future gravitational-wave observatories Open
Gravitational waves are emitted from deep within a core-collapse supernova, which may enable us to determine the mechanism of the explosion from a gravitational-wave detection. Previous studies suggested that it is possible to determine if…