6 papers
A comparative study of emergent dark energy models
Andrés García-Rivera, A. Hernández-Almada, Miguel A. García-Aspeitia +1
Late (emergent) dark energy models that involve a hyperbolic tangent in their dynamic equations have achieved success due to their simplicity, the possibility of resolving the Hubb…
Reconstructing the cosmic expansion with a generalized q(z) parameterization: A decelerating Universe from late-time constraints
Tomás Verdugo, Alberto Hernández-Almada, Miguel A. GarcÃa-Aspeitia +2
We present a generalized phenomenological parameterization of the deceleration parameter that incorporates an effective radiative component (ERC) in addition to a localized…
Enhancing Gravitational Lens Study with Deep Learning: A Study on Effects of Dropout Regularization
Juan J. Ancona-Flores, A. Hernández-Almada, V. Motta
Strong gravitational lensing provides valuable insights into the mass distribution of galaxies and the nature of dark matter. However, its modeling is computationally demanding due…
DESI and fast radio burst used to constrain modified theories of gravity
J. A. Astorga-Moreno, Miguel A. GarcÃa-Aspeitia, A. Hernández-Almada +1
This paper is devoted to the study of the viability of DESI and the fast radio burst to constrain the free parameters of modified theories of gravity. Thus, we present a model supp…
The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
Eleonora Di Valentino, Jackson Levi Said, Adam Riess +533
The standard model of cosmology has provided a good phenomenological description of a wide range of observations both at astrophysical and cosmological scales for several decades.…
On a model of variable curvature that mimics the observed Universe acceleration
A. Esteban-Gutiérrez, Miguel A. GarcÃa-Aspeitia, A. Hernández-Almada +2
We present a new model based on General Relativity in where a subtle change of curvature at late times is able to produce the observed Universe acceleration and an oscillating beha…