Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Cedeño, Francisco X. Linares"'
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 Bayesian analysis
Externí odkaz:
http://arxiv.org/abs/2312.10924
With focus on the cosmological evolution of linear perturbations of matter and geometry, we calculate the equivalent expressions to that of the Newtonian and Synchronous gauges within the framework of Unimodular Gravity, being these two gauges common
Externí odkaz:
http://arxiv.org/abs/2307.04873
We present a numerical analysis of the cosmological evolution of scalar field dark matter (SFDM) in the Boltzmann code $\texttt{CLASS}$, based on a dynamical system analysis of previous works. We show a detailed study of the evolution of the differen
Externí odkaz:
http://arxiv.org/abs/2307.05600
We perform a Bayesian study of a generalization of the basic $\alpha$-attractor T model given by the potential $V(\phi)=V_0\left[1-\text{sech}^{p}\left(\phi/\sqrt{6\alpha}M_{pl}\right)\right]$ where $\phi$ is the inflaton field and the parameter $\al
Externí odkaz:
http://arxiv.org/abs/2212.13610
In this work, we study tracker phantom dark energy models with a general parameterization of the scalar potentials. Our analysis also considers the scenario of having both phantom field and the cosmological constant as the dark energy components. A d
Externí odkaz:
http://arxiv.org/abs/2105.07103
We study the cosmological evolution for a scalar field dark matter model, by considering a parameterization of the evolution equations that allow us to unify in a single parameter a family of potentials: quadratic (free case), trigonometric (Axion-li
Externí odkaz:
http://arxiv.org/abs/2102.05074
Within the framework of Unimodular Gravity, we consider non-gravitational interactions between dark matter and dark energy. Particularly, we describe such interactions in the dark sector by considering diffusion models that couple the cold dark matte
Externí odkaz:
http://arxiv.org/abs/2009.10268
Autor:
Quiros, Israel, De Arcia, Roberto, García-Salcedo, Ricardo, Gonzalez, Tame, Cedeño, Francisco X. Linares, Nucamendi, Ulises
Publikováno v:
Phys. Rev. D 103, 064043 (2021)
In this paper we investigate the cosmological dynamics of geometric inflation by means of the tools of the dynamical systems theory. We focus in the study of two explicit models where it is possible to sum the infinite series of higher curvature corr
Externí odkaz:
http://arxiv.org/abs/2007.06111
A scalar field $\phi$ endowed with a trigonometric potential has been proposed to play the role of Dark Matter. A deep study of the cosmological evolution of linear perturbations, and its comparison to the Cold Dark Matter (CDM) and Fuzzy Dark Matter
Externí odkaz:
http://arxiv.org/abs/2006.05037
Autor:
Germán, Gabriel, Hidalgo, Juan Carlos, Cedeño, Francisco X. Linares, Montiel, Ariadna, Vázquez, J. Alberto
Publikováno v:
Phys. Rev. D 101, 023507 (2020)
We study a model of inflation based on $\mathcal{N}=1$ supergravity essentially depending on one effective parameter. Under a field transformation we show that this model turns out to be equivalent to a previously studied supergravity model known to
Externí odkaz:
http://arxiv.org/abs/1909.02019