66 citations · 684 across the 31 of their papers we have counts for
30 papers
MeV dark energy emission from a de Sitter Universe
Yasmín B. Alcántara-Pérez, Miguel A. García-Aspeitia, H. Martíınez-Huerta +1
The evolution of a de Sitter Universe is the base for both the accelerated Universe and the late stationary Universe. So how do we differentiate between both universes? In this pap…
General perturbations in D+1 standard and brane cosmology revisited
Zoé Delfín, Rubén Cordero, Tonatiuh Matos +1
In the present work, we generalize the theory of perturbations in a D + 1 dimensional space-time with cosmological constant, studying scalar, vector and tensor perturbations, as we…
Constraining uber gravity with recent observations and studying the problem
Gustavo A. Concha Valdez, Claudia Quintanilla, Miguel A. García-Aspeitia +2
This paper studies both CDM and CDM models under the über gravity theory, named üCDM and üCDM respectively. We report bounds over their parameter phase-space using several co…
Cosmology under the fractional calculus approach
Miguel A. García-Aspeitia, Guillermo Fernandez-Anaya, A. Hernández-Almada +2
Fractional cosmology modifies the standard derivative to Caputo's fractional derivative of order , generating changes in General Relativity. Friedmann equations are modified, an…
Barrow Entropy Cosmology: an observational approach with a hint of stability analysis
Genly Leon, Juan Magaña, A. Hernández-Almada +3
In this work, we use an observational approach and dynamical system analysis to study the cosmological model recently proposed by Saridakis (2020), which is based on the modificati…
A hybrid model of viscous and Chaplygin gas to tackle the Universe acceleration
A. Hernández-Almada, Miguel A. García-Aspeitia, M. A. Rodrírgues-Meza +1
Motivated by two seminal models proposed to explain the Universe acceleration, this paper is devoted to study a hybrid model which is constructed through a generalized Chaplygin ga…
Constraints and cosmography of CDM in presence of viscosity
L. Herrera-Zamorano, A. Hernández-Almada, Miguel A. García-Aspeitia
In this work, we study two scenarios of the Universe filled by a perfect fluid following the traditional dark energy and a viscous fluid as dark matter. In this sense, we explore t…
Stability analysis and constraints on interacting viscous cosmology
A. Hernández-Almada, Miguel A. García-Aspeitia, Juan Magaña +1
In this work we study the evolution of a spatially flat Universe by considering a viscous dark matter and perfect fluids for dark energy and radiation, including an interaction ter…
Generalized Emergent Dark Energy: observational Hubble data constraints and stability analysis
A. Hernández-Almada, Genly Leon, Juan Magaña +2
Recently \citet{PEDE:2019ApJ} proposed a phenomenologically emergent dark energy (PEDE) which consider that the dark energy density evolves as $\widetildeΩ_{\rm{DE}}(z)\,=\,Ω_{\rm{…
Gravitational waves in braneworlds after multi-messenger events
Miguel A. García-Aspeitia, Celia Escamilla-Rivera
The GW170817 event opened a new window to test modifications to General Relativity with the aim of discard or impose strong constraints in extra dimension theories of gravity. Conc…
The Universe acceleration from the Unimodular gravity view point: Background and linear perturbations
Miguel A. García-Aspeitia, A. Hernández-Almada, Juan Magaña +1
With the goal of studying the cosmological constant (CC) problem, we present an exhaustive analysis of unimodular gravity as a possible candidate to resolve the CC origin and with…
Compact objects in unimodular gravity
J. A. Astorga-Moreno, Javier Chagoya, J. C. Flores-Urbina +1
Unimodular gravity provides a theoretical framework that allows for non-conservation of energy-momentum, with possible implications for the cosmological constant problem. It is the…
Cosmic acceleration in unimodular gravity
Miguel A. García-Aspeitia, C. Martínez-Robles, A. Hernández-Almada +2
We study unimodular gravity in the context of cosmology, particularly some interesting consequences that might be able to describe the background cosmology and the late cosmic acce…
Cosmological constraints on alternative model to Chaplygin fluid revisited
A. Hernandez-Almada, Juan Magana, Miguel A. Garcia-Aspeitia +1
In this work we explore an alternative phenomenological model to Chaplygin gas proposed by H. Hova et. al., consisting on a modification of a perfect fluid, to explain the dynamics…
Brane with variable tension as a possible solution to the problem of the late cosmic acceleration
Miguel A. Garcia-Aspeitia, A. Hernandez-Almada, Juan Magaña +3
Braneworld models have been proposed as a possible solution to the problem of the accelerated expansion of the Universe. The idea is to dispense the dark energy (DE) and drive the…
Cosmological analysis of a DGP stable model with observations a revision
Gabriela Bárcenas-Enríquez, Celia Escamilla-Rivera, Miguel A. Garcia-Aspeitia
In this paper, we will present a Dvali-Gabadadze-Porrati stable model in order to perform an observational test using data and radial BAO scale in the galaxy distribution. I…
The presence of a Phantom field in a Randall-Sundrum scenario
Rubén O. Acuña-Cárdenas, J. A. Astorga-Moreno, Miguel A. Garcia-Aspeitia +1
The presence of phantom dark energy in brane world cosmology generates important new effects, causing a premature Big Rip singularity when we increase the presence of extra dimensi…
Testing noncommutativity-like model as a galactic density profile
Juan J. Ancona-Flores, A. Hernandez-Almada, Miguel A. Garcia-Aspeitia
Noncommutative-like model (NC-like) is an interesting alternative inspired by string theory to understand and describe the velocity rotation curves of galaxies without the inclusio…
Cosmological constant problem in a scenario with compactifications (RS-I model)
C. Martinez-Robles, Miguel A. Garcia-Aspeitia
In this letter, we apply the Randall-Sundrum (RS) model, a scenario based on compactifications, to control the UV divergence of the zero-point energy density equation for the vacuu…
Energy density profile inspired by noncommutativity
Miguel A. Garcia-Aspeitia, J. C. Lopez-Dominguez, C. Ortiz +2
An important consequence which comes from noncommutativity (NC) is undoubtedly the energy density characterized by a microscopic free parameter; indeed a Trans-Planckian parameter.…
Branes constrictions with White Dwarfs
Miguel A. Garcia-Aspeitia
We consider here a robust study of stellar dynamics for White Dwarf Stars with polytropic matter in the weak field approximation using the Lane-Emden equation from the brane-world…
Constraining brane tension using rotation curves of galaxies
Miguel A. Garcia-Aspeitia, Mario A. Rodriguez-Meza
We present in this work a study of brane theory phenomenology focusing on the brane tension parameter, which is the main observable of the theory. We show the modifications steamin…
Stellar models in Brane Worlds
Francisco X. Linares, Miguel A. Garcia-Aspeitia, L. Arturo Ureña-Lopez
We consider here a full study of stellar dynamics from the brane-world point of view in the case of constant density and of a polytropic fluid. We start our study cataloguing the m…
Gravitational collapse in brane-worlds revisited
Miguel A. Garcia-Aspeitia, C. Ortiz, J. C. Lopez-Dominguez +2
This paper is dedicated to revisit the modifications caused by branes in the collapse of a stellar structure under the Snyder-Oppenheimer scheme. Due to the homogeneity and isotrop…