Observational constraints on holographic dark energy with varying gravitational constant

Lu, Jianbo; Saridakis, Emmanuel N.; Setare, M. R.; Xu, Lixin

doi:10.1088/1475-7516/2010/03/031

Cited by 121 publications

(61 citation statements)

References 113 publications

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“…In addition, it is shown that DE takes up about two-thirds of the total energy density from cosmic observations. In theory many kinds of DE models [5][6][7][8][9][10][11][12][13][14][15] have already been constructed to explore the DE properties.…”

Section: Introductionmentioning

confidence: 99%

Combined constraints on modified Chaplygin gas model from cosmological observed data: Markov Chain Monte Carlo approach

et al. 2010

Gen Relativ Gravit

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We use the Markov Chain Monte Carlo method to investigate a global constraints on the modified Chaplygin gas (MCG) model as the unification of dark matter and dark energy from the latest observational data: the Union2 dataset of type supernovae Ia (SNIa), the observational Hubble data (OHD), the cluster X-ray gas mass fraction, the baryon acoustic oscillation (BAO), and the cosmic microwave background (CMB) data. In a flat universe, the constraint results for MCG model are, b h 2 = 0.02263 +0.00184 −0.00162 (1σ ) +0.00213 −0.00195 (2σ ), B s = 0.7788 +0.0736 −0.0723 (1σ ) +0.0918 −0.0904 (2σ ), α = 0.1079 +0.3397 −0.2539 (1σ ) +0.4678 −0.2911 (2σ ), B = 0.00189 +0.00583 −0.00756 (1σ ) +0.00660 −0.00915 (2σ ), and H 0 = 70.711 +4.188 −3.142 (1σ ) +5.281 −4.149 (2σ ).Keywords Modified Chaplygin gas (MCG) · Unification of dark matter and dark energy

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Section: Introductionmentioning

confidence: 99%

Combined constraints on modified Chaplygin gas model from cosmological observed data: Markov Chain Monte Carlo approach

et al. 2010

Gen Relativ Gravit

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“…Similarly, correspondences are established between HDE and other scalar field models of DE [37][38][39] while in other studies, HDE is studied in alternative gravity theories like Braneworld, f (R), scalar-tensor gravity, Brans-Dicke (BD) and DGP model etc [40][41][42][43][44][45][46][47][48][49][50]. The HDE also best fits with the observational data of CMB and supernova of type Ia [51][52][53][54][55][56].…”

Section: Introductionmentioning

confidence: 61%

Holographic dark energy in Brans–Dicke theory with logarithmic correction

et al. 2011

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In the derivation of holographic dark energy density, the area law of the black hole entropy plays a crucial role. However, the entropy-area relation can be modified from the inclusion of quantum effects, motivated from the loop quantum gravity, string theory and black hole physics. In this paper, we study cosmological implication of the interacting entropy-corrected holographic dark energy model in the framework of Brans-Dicke cosmology. We obtain the equation of state and the deceleration parameters of the entropy-corrected holographic dark energy in a non-flat Universe. As system's IR cutoff we choose the radius of the event horizon measured on the sphere of the horizon, defined as L = ar(t). We find out that when the entropy-corrected holographic dark energy is combined with the Brans-Dicke field, the transition from normal state where w D > −1 to the phantom regime where w D < −1 for the equation of state of interacting dark energy can be more easily achieved for than when resort to the Einstein field equations is made.

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“…It was also demonstrated that the HDE model can fit well cosmological data obtained thanks to observations of both CMB radiation anisotropies and SNeIa [76][77][78].…”

Section: Introductionmentioning

confidence: 74%

Power Law and Logarithmic Ricci Dark Energy Models in Hořava-Lifshitz Cosmology

Pasqua

Chattopadhyay²,

Khurshudyan

et al. 2014

Int J Theor Phys

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In this work, we studied the Power Law and the Logarithmic Entropy Corrected versions of the Ricci Dark Energy (RDE) model in a spatially non-flat universe and in the framework of Hořava-Lifshitz cosmology. For the two cases containing non-interacting and interacting RDE and Dark Matter (DM), we obtained the exact differential equation that determines the evolutionary form of the RDE energy density parameter. Moreover, we obtained the expressions of the deceleration parameter q and, using a parametrization of the equation of state (EoS) parameter ω D as ω D (z) = ω 0 + ω 1 z, we derived the expressions of both ω 0 and ω 1 . We interestingly found that the expression of ω 0 is the same for both non-interacting and interacting case. The expression of ω 1 for the interacting case has strong dependence from the interacting parameter b 2 . The parameters derived in this work are done in small redshift approximation and for low redshift expansion of the EoS parameter. * Electronic address: toto.pasqua@gmail.com; Electronic address: surajcha@iucaa.ernet.in; Electronic ad-2

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Observational constraints on holographic dark energy with varying gravitational constant

Cited by 121 publications

References 113 publications

Combined constraints on modified Chaplygin gas model from cosmological observed data: Markov Chain Monte Carlo approach

Combined constraints on modified Chaplygin gas model from cosmological observed data: Markov Chain Monte Carlo approach

Holographic dark energy in Brans–Dicke theory with logarithmic correction

Power Law and Logarithmic Ricci Dark Energy Models in Hořava-Lifshitz Cosmology

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