2024-03-29T14:17:04Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/408692021-06-24T07:22:41Zcom_10324_22154com_10324_954com_10324_894col_10324_22155
Testing the equation of state for viscous dark energy
Odintsov, Sergei D.
Sáez Gómez, Diego
Sharov, German S.
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.
2020-05-16T11:21:36Z
2020-05-16T11:21:36Z
2020-05-16T11:21:36Z
2020
info:eu-repo/semantics/article
Physical Review D, 2020, vol. 101
2470-0010
http://uvadoc.uva.es/handle/10324/40869
10.1103/PhysRevD.101.044010
4
Physical Review D
101
2470-0029
eng
info:eu-repo/semantics/openAccess