Interacting dark sector with variable vacuum energy

 

Autores
Chimento, Luis Pascual; Richarte, Martín Gustavo; Sánchez García, Iván E.
Tipo de recurso
artículo
Estado
Versión publicada
Año de publicación
2013
País
Argentina
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio
CONICET Digital (CONICET)
Descripción
We examine a cosmological scenario where dark matter is coupled to a variable vacuum energy while baryons and photons are two decoupled components for a spatially flat Friedmann-Robertson-Walker spacetime. We apply the χ2 method to the updated observational Hubble data for constraining the cosmological parameters and analyze the amount of dark energy in the radiation era. We show that our model fulfills the severe bound of Ωx(z≃1100)<0.009 at the 2σ level, so it is consistent with the recent analysis that includes cosmic microwave background anisotropy measurements from the Planck survey, the Atacama Cosmology Telescope, and the South Pole Telescope along with the future constraints achievable by the Euclid and CMBPol experiments, and fulfills the stringent bound Ωx(z≃1010)<0.04 at the 2σ level in the big-bang nucleosynthesis epoch.
Idioma
inglés
OAI Identifier
oai:ri.conicet.gov.ar:11336/664
Enlace del recurso
http://hdl.handle.net/11336/664
Nivel de acceso
Acceso abierto
Materia
nonlinear interaction
variable vacuum energy
early dark energy
dark matter
Ciencias Naturales y Exactas
Ciencias Físicas
Otras Ciencias Físicas