Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Montiel, Ariadna"'
Publikováno v:
JCAP11(2024)002
We compare light propagation through an intense electromagnetic background as described by three different nonlinear electrodynamics: Born-Infeld (BI), Euler-Heisenberg (EH), and Modified Maxwell (MM). We use the concept of effective metric to determ
Externí odkaz:
http://arxiv.org/abs/2407.21326
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
Publikováno v:
JCAP07(2021)001
We study perturbations of a complex scalar field during reheating with no self-interaction in the regime $ \mu \gg H$, when the scalar field has a fast oscillatory behaviour (close to a pressure-less fluid). We focus on the precise determination of t
Externí odkaz:
http://arxiv.org/abs/2101.02156
We present a sample of 74 Gamma-Ray Bursts (GRBs) from the Fermi-GBM catalogue for which we compute the distance moduli and use them to constrain effective dark energy models. To overcome the circularity problem affecting GRBs as distance indicators,
Externí odkaz:
http://arxiv.org/abs/2003.03387
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
Dark energy models with tracker properties have gained attention due to the large range of initial conditions leading to the current value of the dark energy density parameter. A well-motivated family of these models are the so-called $\alpha$-attrac
Externí odkaz:
http://arxiv.org/abs/1905.00834
We show how to constrain inflationary models and reheating by using mixed constraints. In particular we study the physics of the reheating phase after inflation from observational constraints to the inflationary stage. We show that it is possible to
Externí odkaz:
http://arxiv.org/abs/1811.09331
Publikováno v:
MNRAS 488 (2019) 5127-5144
We present a non-parametric reconstruction of the rotation curves (RC) for 88 spiral galaxies under the LOESS+SIMEX technique. In order to compare methods we also perform the parametric approach assuming core and cuspy dark matter (DM) profiles: PISO
Externí odkaz:
http://arxiv.org/abs/1809.06875
Publikováno v:
Phys. Rev. D 92, 024042 (2015)
The modified geodetic brane cosmology (MGBC) is tested with observational data. The MGBC is derived from the geodetic brane gravity action corrected by the extrinsic curvature of the braneworld. The density parameter coming from this additional term
Externí odkaz:
http://arxiv.org/abs/1506.00644
Publikováno v:
Physics Letters B 733C (2014), pp. 209-216
In this work we investigate if a small fraction of quarks and gluons, which escaped hadronization and survived as a uniformly spread perfect fluid, can play the role of both dark matter and dark energy. This fluid, as developed in \citep{Brilenkov},
Externí odkaz:
http://arxiv.org/abs/1404.0388