A5020333036- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Scientific Research and Discoveries
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Relativity and Gravitational Theory
- Computational Physics and Python Applications
- Quantum, superfluid, helium dynamics
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Geophysics and Gravity Measurements
Benemérita Universidad Autónoma de Puebla
2020-2025
Czech Academy of Sciences, Institute of Physics
2024
Czech Academy of Sciences
2024
Instituto Politécnico Nacional
2018
Center for Research and Advanced Studies of the National Polytechnic Institute
2018
University of Nottingham
2015
Universidad Nacional Autónoma de México
2007
We compare Einstein-Boltzmann solvers that include modifications to general relativity and find that, for a wide range of models parameters, they agree high level precision. look at three purpose codes primarily model scalar-tensor theories, Jordan-Brans-Dicke (JBD) gravity, code $f(R)$ covariant Galileons, Ho\ifmmode \check{r}\else \v{r}\fi{}ava-Lifschitz two nonlocal gravity. Comparing predictions the angular power spectrum cosmic microwave background dark matter suite different models, we...
Abstract In the context of a homogeneous and isotropic universe, we consider degeneracy condition at background level between two scenarios in which processes out equilibrium are possible; this consideration allows us to deviate from perfect fluid description, case bulk viscosity represents viable candidate describe entirely such effects. The cosmological model describing an unstable dark matter sector is mapped into slight modification $$\Lambda $$ <mml:math...
Light degrees of freedom that modify gravity on cosmological scales must be ``screened" solar system in order to compatible with data. The Vainshtein mechanism achieves this through a breakdown classical perturbation theory, as large interactions involving new become important below the so-called radius. We begin develop an extension Parameterized Post-Newtonian (PPN) formalism is able handle Vainshteinian corrections. argue theories unique scale expanded using two small parameters. In...
Although the standard cosmological model, so-called $Λ$ Cold Dark Matter ("$Λ$CDM"), appears to fit well observations at level, it is known that possesses several inconsistencies galactic scales. In order address problems of $Λ$CDM small scales, alternative models have been proposed, among most popular ones proposal dark matter in Universe being made ultra-light bosons a strong candidate nowadays. At this work, we study through an analytical approach consequences arising from confronting...
We explore the dynamical properties of a cosmological model that includes viscous effects in dark matter sector fluid equations flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime. The bulk are described by non linear extension full Israel-Stewart model. allow interchange energy means interaction term, namely $Q$. establish system corresponding to Friedmann and set associated study stability its critical points. From system, we show appearance point characterizing de Sitter universe...
In the context of an homogeneous and isotropic universe, we consider degeneracy condition at background level between two scenarios in which processes out equilibrium are possible to explore their cosmological implications; this consideration allows us deviate from perfect fluid description case bulk viscosity represents a viable candidate describe entirely such effects. The model describing unstable dark matter sector is mapped into slight modification $\Lambda$CDM characterized by viscous...
The estimation of galactic component masses can be carried out through various approaches that involve a host assumptions about baryon dynamics or the dark matter model. In contrast, this work introduces an alternative method for predicting disk, bulge, stellar, and total mass using k-nearest neighbours, linear regression, random forest, neural network (NN) algorithms, reducing dependence on any particular hypothesis. ugriz photometric system was selected as set input features, training...
In this paper, we implement the adaptive moving mesh method (AMM) to solution of initial value problems involving Schr\"odinger equation, and more specifically Schr\"odinger-Poisson system equations. This is based on problem a discrete domain, whose resolution coordinate time-dependent, allows us dynamically assign numerical in terms desired refinement criteria. We apply solve various test stationary solutions SP system, toy scenarios related disruption subhalo s made ultralight bosonic dark...
ABSTRACT In this work, we study some properties of the Hickson Compact Groups (HCGs) using N-body simulations for Generalized Dark Matter (GDM) model, described by three free functions, sound speed, viscosity, and equation state. We consider GDM models associated with different values functions to neglect collisional effects. constructed initial seeds our according matter power spectrum linear perturbations, which hold a cut-off at small scales, explored their effects on non-linear structure...
In this paper we study the coupling of scalar (Higgs) particles ($ϕ$) with gravitons ($h$) and their possible effects. The general form 3-point interaction $ϕ(p) h(1)h(2)$ can be derived using scaling behavior spinor variables under little group; resulting vertices exhibit such simplicity, that some simplifications should hidden in expressions obtained from extended action. To investigate this, an Einstein-Hilbert action besides minimal coupling, it also includes terms $ϕR^2$, $ϕR^{μν}...
In this work we study the annihilation of fermionic dark matter, considering it as a neutral particle with non-vanishing magnetic ($M$) and electric ($D$) dipole moments. Effective cross section process $χ\overlineχ \rightarrow γγ$ is computed starting from general form coupling γ$ in framework an extension Standard Model. By taking into account matter pairs mono-energetic photons, found that for masses $O(10^2)$ GeV, moment $\sim 10^{-16}\, \textrm{e cm}$ required to satisfy current relic...
We are interested in the purpose of a dipolar fermionic particle as viable candidate Dark Matter (DDM). Then, we study annihilation dark matter into photons, considering it neutral with non-vanishing magnetic (M) and electric (D) moments. The total cross section σ(χ → γ ) is computed by starting from general form coupling χγ framework beyond to Standard Model (BSM). found that candidates O(mχ )∽102GeV, D≈10−16 e cm required order satisfy current cosmic relic density.
We explore the dynamical properties of a cosmological model that includes viscous effects in dark matter sector fluid equations flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime. The bulk are described by non linear extension full Israel-Stewart model. allow interchange energy means interaction term, namely $Q$. establish system corresponding to Friedmann and set associated study stability its critical points. From system, we show appearance point characterizing de Sitter universe...
In this work we study the annihilation of fermionic dark matter, considering it as a neutral particle with non-vanishing magnetic ($M$) and electric ($D$) dipole moments. Effective cross section process $\chi \overline{\chi} \rightarrow \gamma \gamma$ is computed starting from general form coupling in framework an extension Standard Model. By taking into account matter pairs mono-energetic photons, found that for masses $O(10^2)$ GeV, moment $\sim 10^{-16}\, \textrm{e cm}$ required to...