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Título
Testing the equation of state for viscous dark energy
Año del Documento
2020
Documento Fuente
Physical Review D, 2020, vol. 101
Resumen
Some cosmological scenarios with bulk viscosity for the dark energy fluid are considered. Based on
some considerations related to hydrodynamics, two different equations of state for dark energy are
assumed, leading to power-law and logarithmic effective corrections to the pressure. The models are tested
with the latest astronomical data from type Ia supernovae (Pantheon sample), measurements of the Hubble
parameter HðzÞ, baryon acoustic oscillations and cosmic microwave background radiation. In comparison
with the ΛCDM model, some different results are obtained and their viability is discussed. The power-law
model shows some modest results, achieved under negative values of bulk viscosity, while the logarithmic
scenario provide good fits in comparison to the ΛCDM model.
ISSN
2470-0010
Revisión por pares
SI
Patrocinador
Ministerio de Economía, Industria y Competitividad (project FIS2016-76363-P)
Agencia de Gestión de Ayudas Universitarias y de Investigación (project 2017 SGR 247)
CANTATA COST action (grant CA15117)
Agencia de Gestión de Ayudas Universitarias y de Investigación (project 2017 SGR 247)
CANTATA COST action (grant CA15117)
Idioma
eng
Tipo de versión
info:eu-repo/semantics/draft
Derechos
openAccess
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