54 citations · 99 across the 15 of their papers we have counts for
15 papers
A 3+1 Perturbative Approach to the Cosmic Dynamo Equation
Juan F. Bravo, Leonardo Castañeda, Héctor J. Hortúa
In this work, we analyze the evolution of PMFs within a perturbed Friedmann-Lema\^ıtre-Robertson-Walker (FLRW) spacetime using the formalisms of Numerical Relativity (NR). We apply…
A comprehensive modelling and experimental approach for damped oscillations in U-tubes via Easy JavaScript Simulations
Fredy A Orjuela, Jorge Enrique García-Farieta, Héctor J Hortúa +1
In recent years, science simulations have become popular among educators due to their educational usefulness, availability, and potential for increasing the students' knowledge on…
About Jordan and Einstein frames: a study in inflationary magnetogenesis
Joel Velásquez, Héctor J. Hortua, Leonardo Castañeda
There has been considerable interest in the community to understand if the Einstein and Jordan frames are either physically equivalent to each other or if there exists a preference…
Constraining cosmological parameters from N-body simulations with Bayesian Neural Networks
Hector J. Hortua
In this paper, we use The Quijote simulations in order to extract the cosmological parameters through Bayesian Neural Networks. This kind of model has a remarkable ability to estim…
Accelerating MCMC algorithms through Bayesian Deep Networks
Hector J. Hortua, Riccardo Volpi, Dimitri Marinelli +1
Markov Chain Monte Carlo (MCMC) algorithms are commonly used for their versatility in sampling from complicated probability distributions. However, as the dimension of the distribu…
Reliable Uncertainties for Bayesian Neural Networks using Alpha-divergences
Hector J. Hortua, Luigi Malago, Riccardo Volpi
Bayesian Neural Networks (BNNs) often result uncalibrated after training, usually tending towards overconfidence. Devising effective calibration methods with low impact in terms of…
Parameters Estimation for the Cosmic Microwave Background with Bayesian Neural Networks
Hector J. Hortua, Riccardo Volpi, Dimitri Marinelli +1
In this paper, we present the first study that compares different models of Bayesian Neural Networks (BNNs) to predict the posterior distribution of the cosmological parameters dir…
Cosmological Features of Primordial Magnetic Fields
Hector J. Hortua
The aim of this thesis is to study the effects on the CMB anisotropy due to primordial magnetic fields and to analyze some favorable scenarios of magnetogenesis constrained by thos…
Reduced bispectrum seeded by helical primordial magnetic fields
Hector J. Hortua, Leonardo Castañeda
In this paper, we investigate the effects of helical primordial magnetic fields (PMFs) on the cosmic microwave background (CMB) reduced bispectrum. We derive the full three-point s…
Effects of primordial magnetic fields on CMB
Hector J. Hortua, Leonardo Castañeda
The origin of large-scale magnetic fields is an unsolved problem in cosmology. In order to overcome, a possible scenario comes from the idea that these fields emerged from a small…
Equivalence between formulations in Cosmological Perturbation Theory: The primordial magnetic fields as an example
Hector J. Hortua, Leonardo Castañeda
Nowdays, Cosmological Perturbation Theory is a standard and useful tool in theoretical cosmology. In this work, we compare the 1+3 covariant formalism in perturbation theory (Ellis…
Power spectrum of post-inflationary primordial magnetic fields
Hector J. Hortua, Leonardo Castañeda
The origin of large scale magnetic fields is one of the most puzzling topics in cosmology and astrophysics. It is assumed that the observed magnetic fields result from the amplific…
Contrasting formulations of cosmological perturbations in a magnetic FLRW cosmology
Hector J. Hortua, Leonardo Castañeda
In this paper we contrasted two cosmological perturbation theory formalisms, the 1+3 covariant gauge invariant and the gauge invariant by comparing their gauge invariant variables…
Evolution of magnetic fields through cosmological perturbation theory
Hector J. Hortua, Leonardo Castaneda, Juan M. Tejeiro
The origin of galactic and extra-galactic magnetic fields is an unsolved problem in modern cosmology. A possible scenario comes from the idea of these fields emerged from a small f…
Temperature for the (2+1)-dimensional Black Hole with Non Linear Electrodynamics from the Generalized Uncertainty Principle
Alexis Larranaga, Hector J. Hortua
In this paper, we study the thermodynamical properties of the (2+1) dimensional black hole with a non-linear electrodynamics and with a negative cosmological constant, using the Ge…