Viable Curvaton Models from the $f_{NL}$ Parameter

Autor:	Guimarães, L. F., Falciano, F. T.
Rok vydání:	2020
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
Zdroj:	Phys. Rev. D 103, 063530 (2021)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.103.063530
Popis:	We show how to build a curvaton inflationary model motivated by scale-dependent non-Gaussianities of cosmological perturbations. In particular, we study the change of sign in the $f_{NL}$ parameter as a function of the curvaton field value at horizon crossing and identify it with the cosmic microwave background pivot scale. We devise a procedure to recover the curvaton model that provides the desired $f_{NL}$ parameter. We then present a concrete example of $f_{NL}$ and construct its parent model. We study the constraints applied to this model based on considerations taken on $f_{NL}$. We show that the hemispherical asymmetry can also be used to constrain the scale-dependence of $f_{NL}$ and the model parameters. Comment: 11 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2011.13888 Zobrazit plný text záznamu View this record from Arxiv