A new pressure-parametrization unified dark fluid model

Autor: Xin-He Meng, Deng Wang, Yang-Jie Yan
Rok vydání: 2017
Předmět:
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Physics and Astronomy (miscellaneous)
Quintessence Field
media_common.quotation_subject
Scalar (mathematics)
FOS: Physical sciences
lcsh:Astrophysics
Lambda-CDM model
General Relativity and Quantum Cosmology (gr-qc)
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
01 natural sciences
General Relativity and Quantum Cosmology
symbols.namesake
Theoretical physics
Baryonic Acoustic Oscillation
Cosmic Microwave Background
lcsh:QB460-466
0103 physical sciences
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
Phantom Field
Planck
010303 astronomy & astrophysics
Engineering (miscellaneous)
media_common
Physics
010308 nuclear & particles physics
Dark Energy
Universe
Dark energy
symbols
lcsh:QC770-798
Dark fluid
Astrophysics - Cosmology and Nongalactic Astrophysics
Quintessence
Hubble's law
Zdroj: European Physical Journal C: Particles and Fields, Vol 77, Iss 4, Pp 1-9 (2017)
European Physical Journal C
ISSN: 1434-6052
1434-6044
DOI: 10.1140/epjc/s10052-017-4827-4
Popis: We propose a new pressure-parametrization model to explain the accelerated expansion of the late-time Universe by considering the baryon matter and dark contents (dark matter and dark energy) as a unified dark fluid. To realize this model more physically, we reconstruct it with the quintessence and phantom scalar fields, respectively. We use the recent cosmological data to constrain this model, distinguish it from the standard cosmological model and find that the value of the Hubble constant $$H_0=68.34^{+0.53}_{-0.92}$$ H 0 = 68 . 34 - 0.92 + 0.53 supports the global measurement by the Planck satellite at the $$1\sigma $$ 1 σ confidence level.
Databáze: OpenAIRE
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