Is the cosmological dark sector better modeled by a generalized Chaplygin gas or by a scalar field?

Sergio del Campo, Júlio C. Fabris, Ramón Herrera, Winfried Zimdahl

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

Both scalar fields and (generalized) Chaplygin gases have been widely used separately to characterize the dark sector of the universe. Here we investigate the cosmological background dynamics for a mixture of both these components and quantify the fractional abundances that are admitted by observational data from supernovae of type Ia and from the evolution of the Hubble rate. Moreover, we study how the growth rate of (baryonic) matter perturbations is affected by the dark-sector perturbations.

Idioma originalInglés
Número de artículo479
PublicaciónEuropean Physical Journal C
Volumen77
N.º7
DOI
EstadoPublicada - 1 jul. 2017
Publicado de forma externa

Huella

Profundice en los temas de investigación de 'Is the cosmological dark sector better modeled by a generalized Chaplygin gas or by a scalar field?'. En conjunto forman una huella única.

Citar esto