Juan Carlos Hidalgo
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View article: Non-Gaussian statistics in galaxy weak lensing: compressed three-point correlations and cosmological forecasts
Non-Gaussian statistics in galaxy weak lensing: compressed three-point correlations and cosmological forecasts Open
Building on previous developments of a harmonic decomposition framework for computing the three-point correlation function (3PCF) of projected scalar fields over the sky, this work investigates how much cosmological information is containe…
View article: Primordial black hole formation in a scalar field dominated universe
Primordial black hole formation in a scalar field dominated universe Open
We present a numerical code that solves the Misner-Sharp system for a spherically symmetric cosmological model containing both a scalar field and a perfect fluid. While the code is capable of exploring general scenarios involving a minimal…
View article: Gravitational entropy of fluids with energy flux
Gravitational entropy of fluids with energy flux Open
We examine gravitational entropy growth within the formalism of Clifton, Ellis and Tavakol (CET) applied to a class of spherically symmetric exact solutions whose source is a shear-free fluid with energy flux in a comoving frame. By consid…
View article: Primordial Black Hole Formation in a Scalar Field Dominated Universe: Investigation of the Critical nature of the Collapse
Primordial Black Hole Formation in a Scalar Field Dominated Universe: Investigation of the Critical nature of the Collapse Open
In this paper, we investigate the critical collapse leading to primordial black hole (PBH) formation in a universe dominated by a self-interacting scalar field with a quartic potential, comparing it to the well-known radiation-dominated ca…
View article: H2 Transport in Sedimentary Basin
H2 Transport in Sedimentary Basin Open
Natural hydrogen is generated by fairly deep processes and/or in low-permeability rocks. In such contexts, fluids circulate mainly through the network of faults and fractures. However, hydrogen flows from these hydrogen-generating layers c…
View article: Testing interacting dark energy with Stage IV cosmic shear surveys through differentiable neural emulators
Testing interacting dark energy with Stage IV cosmic shear surveys through differentiable neural emulators Open
We employ a novel framework for accelerated cosmological inference, based on neural emulators and gradient-based sampling methods, to forecast constraints on dark energy models from Stage IV cosmic shear surveys. We focus on dark scatterin…
View article: Primordial Black Hole Formation in a Scalar Field Dominated Universe
Primordial Black Hole Formation in a Scalar Field Dominated Universe Open
We present a numerical code that solves the Misner-Sharp system for a spherically symmetric cosmological model containing both a scalar field and a perfect fluid. While the code is capable of exploring general scenarios involving an minima…
View article: Modeling the 3-point correlation function of projected scalar fields on the sphere
Modeling the 3-point correlation function of projected scalar fields on the sphere Open
One of the main obstacles for the signal extraction of the three point correlation function using photometric surveys, such as the Rubin Observatory Legacy Survey of Space and Time (LSST), will be the prohibitive computation time required …
View article: Detecting the stochastic gravitational wave background from primordial black holes in slow-reheating scenarios
Detecting the stochastic gravitational wave background from primordial black holes in slow-reheating scenarios Open
After primordial inflation, the universe may have experienced a prolonged reheating epoch, potentially leading to a phase of matter domination supported by the oscillating inflaton field. During such an epoch, perturbations in the inflaton…
View article: Constraints on primordial black holes for nonstandard cosmologies
Constraints on primordial black holes for nonstandard cosmologies Open
We study how the bounds on the abundance of Primordial Black Holes (PBHs) and the constraints on power spectrum are modified if a non-standard evolution phase takes place between the end of inflation and the Standard radiation-dominated (R…
View article: Testing interacting dark energy with Stage IV cosmic shear surveys through differentiable neural emulators
Testing interacting dark energy with Stage IV cosmic shear surveys through differentiable neural emulators Open
We employ a novel framework for accelerated cosmological inference, based on neural emulators and gradient-based sampling methods, to forecast constraints on dark energy models from Stage IV cosmic shear surveys. We focus on dark scatterin…
View article: Modeling the 3-point correlation function of projected scalar fields on the sphere
Modeling the 3-point correlation function of projected scalar fields on the sphere Open
One of the main obstacles for the signal extraction of the three point correlation function using photometric surveys, such as the Rubin Observatory Legacy Survey of Space and Time (LSST), will be the prohibitive computation time required …
View article: Dark scattering: accelerated constraints from KiDS-1000 with <scp>ReACT</scp> and <scp>CosmoPower</scp>
Dark scattering: accelerated constraints from KiDS-1000 with <span>ReACT</span> and <span>CosmoPower</span> Open
We present constraints on the dark scattering model through cosmic shear measurements from the Kilo Degree Survey (KiDS-1000), using an accelerated pipeline with novel emulators produced with CosmoPower. Our main emulator, for the dark sca…
View article: New insights from petroleum systems modelling and magnetic analyses on the charge, fill and spill history of the Wytch Farm oil field, Wessex Basin, UK
New insights from petroleum systems modelling and magnetic analyses on the charge, fill and spill history of the Wytch Farm oil field, Wessex Basin, UK Open
Basin and petroleum systems modelling of the Wessex Basin, UK has been conducted to identify the maturation and migration events that charged the principal Bridport Sands and Sherwood Sandstone reservoirs at the Wytch Farm oil field. Model…
View article: Detecting the Stochastic Gravitational Wave Background from Primordial Black Holes in Slow-reheating Scenarios
Detecting the Stochastic Gravitational Wave Background from Primordial Black Holes in Slow-reheating Scenarios Open
After primordial inflation, the universe may have experienced a prolonged reheating epoch, potentially leading to a phase of matter domination supported by the oscillating inflaton field. During such an epoch, perturbations in the inflaton…
View article: Inflationary models constrained by reheating
Inflationary models constrained by reheating Open
The study of reheating in inflationary models is crucial to understand the early universe and obtain information about the dynamics and parameters of inflation. The reheating temperature $$T_{re}$$ and the duration of the reheating phase,…
View article: Solution for cosmological observables in the Starobinsky model of inflation
Solution for cosmological observables in the Starobinsky model of inflation Open
This paper focuses on the Starobinsky model of inflation in the Einstein frame. We derive solutions for various cosmological observables, such as the scalar spectral index $$n_s$$ , the tensor-to-scalar ratio r and their runnings, as w…
View article: Primordial black hole formation during slow-reheating: a review
Primordial black hole formation during slow-reheating: a review Open
In this paper we review the possible mechanisms for the production of primordial black holes (PBHs) during a slow-reheating period in which the energy transfer of the inflaton field to standard model particles becomes effective at slow tem…
View article: Dark Scattering: accelerated constraints from KiDS-1000 with $\tt{ReACT}$ and $\tt{CosmoPower}$
Dark Scattering: accelerated constraints from KiDS-1000 with $\tt{ReACT}$ and $\tt{CosmoPower}$ Open
We present constraints on the Dark Scattering model through cosmic shear measurements from the Kilo Degree Survey (KiDS-1000), using an accelerated pipeline with novel emulators produced with $\tt{CosmoPower}$. Our main emulator, for the D…
View article: Primordial black hole formation during slow-reheating: A review
Primordial black hole formation during slow-reheating: A review Open
In this paper we review the possible mechanisms for the production of primordial black holes (PBHs) during a slow-reheating period {in which the energy transfer of the inflaton field to standard model particles becomes effective at slow te…
View article: New Insights from Petroleum Systems Modelling and Magnetic Analyses on the Charge, Fill and Spill History of the Wytch Farm Oil Field, Wessex Basin, UK
New Insights from Petroleum Systems Modelling and Magnetic Analyses on the Charge, Fill and Spill History of the Wytch Farm Oil Field, Wessex Basin, UK Open
View article: Bayesian Analysis of a Generalized Starobinsky Model with Reheating Constraints
Bayesian Analysis of a Generalized Starobinsky Model with Reheating Constraints Open
We study a generalization of the the Starobinsky model adding a term of the form $R^{2p}$ to the Einstien-Hilbert action. We take the power $p$ as a parameter of the model and explore the constraints from CMB plus BAO data through a Bayesi…
View article: Growth rate of spherical voids with non-comoving dark matter and baryons
Growth rate of spherical voids with non-comoving dark matter and baryons Open
We present numerical solutions to Einstein’s equations describing large spherical cosmic voids constituted by two components: dark matter and baryons, with a non-vanishing initial relative velocity, in an asymptotically homogeneous backgro…
View article: Inflationary models constrained by reheating
Inflationary models constrained by reheating Open
The study of reheating in inflationary models is crucial for understanding the early universe and gaining insights into inflationary dynamics and parameters. The reheating temperature $T_{re}$ and the duration of the reheating phase, quant…
View article: Constraints on primordial black holes for nonstandard cosmologies
Constraints on primordial black holes for nonstandard cosmologies Open
We study how the bounds on the abundance of Primordial Black Holes (PBHs) and the constraints on power spectrum are modified if a non-standard evolution phase takes place between the end of inflation and the Standard radiation-dominated (R…
View article: Solution for cosmological observables in the Starobinsky model of inflation
Solution for cosmological observables in the Starobinsky model of inflation Open
This paper focuses on the Starobinsky model of inflation. We derive solutions for various cosmological observables, such as the scalar spectral index $n_s$, the tensor-to-scalar ratio $r$ and their runnings, as well as the number of $e$-fo…
View article: Growth rate of spherical voids with non-comoving Dark Matter and Baryons
Growth rate of spherical voids with non-comoving Dark Matter and Baryons Open
We present numerical solutions to Einstein's equations describing large spherical cosmic voids constituted by two components; dark matter and baryons, with a non-vanishing initial relative velocity, in an asymptotically homogeneous backgro…
View article: Constraining inflationary potentials with inflaton PBHs
Constraining inflationary potentials with inflaton PBHs Open
If, after primordial inflation, the universe undergoes a relatively long reheating period, it could present a phase of matter domination supported by the oscillating inflaton field. During this epoch, small perturbations from the inflaton …
View article: Hierarchical merger of primordial black holes in dwarf galaxies
Hierarchical merger of primordial black holes in dwarf galaxies Open
We study the merger history of primordial black holes (PBHs) in a scenario where they represent the dominant dark matter component of a typical dwarf galaxies' core. We investigate the possibility of a sequence of collisions resulting in a…
View article: Production of PBHs from inflaton structure
Production of PBHs from inflaton structure Open
At times prior to Big Bang Nucleosynthesis, the universe could show a primordial structure formation period if dominated by a fast oscillating inflaton field during reheating. In this context, we have postulated a new mechanism of primordi…