Observational constraints on Hubble parameter in viscous generalized Chaplygin gas
Sign Up to like & getrecommendations! Published in 2018 at "Indian Journal of Physics"
DOI: 10.1007/s12648-017-1126-8
Abstract: Cosmological model with viscous generalized Chaplygin gas (in short, VGCG) is considered here to determine observational constraints on its equation of state parameters (in short, EoS) from background data. These data consists of $$H(z)-z$$H(z)-z (OHD)… read more here.
Keywords: hubble parameter; generalized chaplygin; chaplygin gas; viscous generalized ... See more keywords
Observational constraint on spherical inhomogeneity with CMB and local Hubble parameter
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/03/033
Abstract: We derive an observational constraint on a spherical inhomogeneity of the void centered at our position from the angular power spectrum of the cosmic microwave background(CMB) and local measurements of the Hubble parameter. The late… read more here.
Keywords: local hubble; hubble parameter; cmb local; observational constraint ... See more keywords
Constraints on dark energy dynamics and spatial curvature from Hubble parameter and baryon acoustic oscillation data
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty1922
Abstract: We use all available baryon acoustic oscillation distance measurements and Hubble parameter data to constrain the cosmological constant $\Lambda$, dynamical dark energy, and spatial curvature in simple cosmological models. We find that the consensus spatially… read more here.
Keywords: baryon acoustic; hubble parameter; energy; acoustic oscillation ... See more keywords
Equivalence of the Chern-Simons state and the Hartle-Hawking and Vilenkin wave functions
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DOI: 10.1103/physrevd.102.044034
Abstract: We show that the Chern-Simons (CS) state when reduced to mini-superspace is the Fourier dual of the Hartle-Hawking (HH) and Vilenkin (V) wave-functions of the Universe. This is to be expected, given that the former… read more here.
Keywords: chern simons; hubble parameter; wave; simons state ... See more keywords
Tachyon constant-roll inflation
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DOI: 10.1103/physrevd.97.083006
Abstract: The constant-roll inflation is studied where the inflaton is taken as a tachyon field. Based on this approach, the second slow-roll parameter is taken as a constant which leads to a differential equation for the… read more here.
Keywords: hubble parameter; roll; constant roll; parameter ... See more keywords
Bouncing cosmology in f (R ,T ) gravity
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.97.123536
Abstract: A cosmological model with a specific form of the Hubble parameter is constructed in a flat homogeneous, and isotropic background in the framework of f(R,T) gravity, where R is the scalar curvature and T is… read more here.
Keywords: hubble parameter; cosmology; model; bouncing cosmology ... See more keywords