Zobrazeno 1 - 10
of 134
pro vyhledávání: '"Hidalgo, Juan Carlos"'
After primordial inflation, the universe may have experienced a prolonged reheating epoch, potentially leading to a phase of matter domination supported by the oscillating inflaton field. During such an epoch, perturbations in the inflaton virialize
Externí odkaz:
http://arxiv.org/abs/2405.19271
Autor:
Carrion, Karim, Carrilho, Pedro, Mancini, Alessio Spurio, Pourtsidou, Alkistis, Hidalgo, Juan Carlos
We present constraints on the Dark Scattering model through cosmic shear measurements from the Kilo Degree Survey (KiDS-1000), using an accelerated pipeline with novel emulators produced with $\tt{CosmoPower}$. Our main emulator, for the Dark Scatter
Externí odkaz:
http://arxiv.org/abs/2402.18562
Autor:
Padilla, Luis E., Hidalgo, Juan Carlos, Gomez-Aguilar, Tadeo D., Malik, Karim A., German, Gabriel
In this paper we review the possible mechanisms for the production of primordial black holes (PBHs) during a slow-reheating period {in which the energy transfer of the inflaton field to standard model particles becomes effective at slow temperatures}
Externí odkaz:
http://arxiv.org/abs/2402.03542
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
The study of reheating in inflationary models is crucial for understanding the early universe and gaining insights into inflationary dynamics and parameters. The reheating temperature $T_{re}$ and the duration of the reheating phase, quantified by th
Externí odkaz:
http://arxiv.org/abs/2310.05221
We study how the bounds on the abundance of Primordial Black Holes (PBHs) and the constraints to the power spectrum (PS) are modified if a non-standard evolution phase takes place between the end of inflation and the Standard Big Bang (SBB). The cons
Externí odkaz:
http://arxiv.org/abs/2308.04642
This paper focuses on the Starobinsky model of inflation. We derive solutions for various cosmological observables, such as the scalar spectral index $n_s$, the tensor-to-scalar ratio $r$ and their runnings, as well as the number of $e$-folds of infl
Externí odkaz:
http://arxiv.org/abs/2307.08257
We present numerical solutions to Einstein's equations describing large spherical cosmic voids constituted by two components; dark matter and baryons, with a non-vanishing initial relative velocity, in an asymptotically homogeneous background compati
Externí odkaz:
http://arxiv.org/abs/2306.02668
If, after primordial inflation, the universe undergoes a relatively long reheating period, it could present a phase of matter domination supported by the oscillating inflaton field. During this epoch, small perturbations from the inflaton that reente
Externí odkaz:
http://arxiv.org/abs/2303.16428
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