Testing backreaction effects with observational Hubble parameter data

Cao, Shui; Teng, Huan-Yu; Wan, Huawei; Yu, Hao-Ran; Zhang, Tong-Jie

doi:10.1140/epjc/s10052-018-5616-4

Cited by 17 publications

(16 citation statements)

References 34 publications

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“…We find constraints that are in good agreement with previously found constraints for the scaling solutions based on SNIa, CMB, the differential age method, and baryon acoustic oscillation measurements in Ref. 17,18. Thus, the scaling solutions provide a self-consistent fit to current and complementary cosmological data.…”

Section: Resultssupporting

confidence: 87%

“…k Comparing the results of Table 1 with the constraints on the scaling solutions from Ref. 18, obtained from measurements of the Hubble parameter from the differential age method and radial baryon acoustic oscillation data, we find agreement within 1 σ of both the scaling index n and the matter cosmological parameter Ω D0 m . We compare the quality of fit of the scaling solutions with that of the ΛCDM model, the empty universe model, and the timescape model using the Akaike In- formation Criterion l (AIC).…”

Section: Resultssupporting

confidence: 65%

“…17, using CMB data and a sparse SNIa sample, and in Ref. 18, using BAO measurements and the differential age method.…”

Section: Introductionmentioning

confidence: 99%

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Dynamical spatial curvature as a fit to Type Ia supernovae

Desgrange

Heinesen

Buchert

2019

Int. J. Mod. Phys. D

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Few statements in cosmology can be made without assuming a cosmological model within which to interpret data. Statements about cosmic acceleration are no exception to this rule, and the inferred positive volume acceleration of our Universe often quoted in the literature is valid in the context of the standard Friedmann-Lemaître-Robertson-Walker (FLRW) class of space-times.Using the Joint Light-curve Analysis (JLA) catalogue of type Ia supernovae (SNIa), we examine the fit of a class of exact scaling solutions with dynamical spatial curvature formulated in the framework of a scalar averaging scheme for relativistic inhomogeneous space-times. In these models, global volume acceleration may emerge as a result of the non-local variance between expansion rates of clusters and voids, the latter gaining volume dominance in the late-epoch Universe.We find best-fit parameters for a scaling model of backreaction that are reasonably consistent with previously found constraints from SNIa, CMB, and baryon acoustic oscillations data. The quality of fit of the scaling solutions is indistinguishable from that of the ΛCDM model and the timescape cosmology from an Akaike Information Criterion (AIC) perspective. This indicates that a broad class of models can account for the z 1 expansion history.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 65%

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Dynamical spatial curvature as a fit to Type Ia supernovae

Desgrange

Heinesen

Buchert

2019

Int. J. Mod. Phys. D

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“…In this work, we have used the latest observational H(z) dataset consisting of 41 data points in the redshift range, 0.07 ≤ z ≤ 2.36, larger than the redshift range that covered by the Type Ia supernova. Among them, 5 new data points of H(z) are obtained from the differential age method by Moresco et al [66] and 36 data points (10 data points are deduced from the radial BAO size method and 26 data points are obtained from the galaxy differential age method) are compiled by Meng et al [67], Cao et al [68] and Zhang et al [69]. In our analysis, we have also used the present value of Hubble parameter H 0 , determined from the combined analysis with Planck+highL+WP+BAO [70].…”

Section: Observational Constraints On the Model Parametersmentioning

confidence: 99%

Observational constraints on the jerk parameter with the data of the Hubble parameter

Mamon

Bamba

2018

Eur. Phys. J. C

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We study the accelerated expansion phase of the universe by using the kinematic approach. In particular, the deceleration parameter q is parametrized in a model-independent way. Considering a generalized parametrization for q, we first obtain the jerk parameter j (a dimensionless third time derivative of the scale factor) and then confront it with cosmic observations. We use the latest observational dataset of the Hubble parameter H(z) consisting of 41 data points in the redshift range of 0.07 ≤ z ≤ 2.36, larger than the redshift range that covered by the Type Ia supernova. We also acquire the current values of the deceleration parameter q0, jerk parameter j0 and transition redshift zt (at which the expansion of the universe switches from being decelerated to accelerated) with 1σ errors (68.3% confidence level). As a result, it is demonstrate that the universe is indeed undergoing an accelerated expansion phase following the decelerated one. This is consistent with the present observations. Moreover, we find the departure for the present model from the standard ΛCDM model according to the evolution of j. Furthermore, the evolution of the normalized Hubble parameter is shown for the present model and it is compared with the dataset of H(z).

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“…where θ represents the set of model parameters, θ = (α, β, γ ). Additionally, we also use the observational Hubble parameter dataset (OHD) of 43 measurement points collected in [34] in the redshift range 0 < z < 2.5. The χ 2 for Observational Hubble Data is…”

Section: Observational Tests: Sne Ohd and Bao Datamentioning

confidence: 99%

Quintessence behavior via matter creation cosmology

Singh

Kumar

2020

Eur. Phys. J. C

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We study the matter creation cosmology as an alternative theory to explain the dark energy phenomena. We discuss the matter-dominated Universe in a flat Friedmann-Robertson-Walker line element by adopting the thermodynamics of open systems, in which the matter creation irreversible processes may take place at a cosmological scale. We propose a new form of the matter creation rate, Γ = 3α H 0 + 3β H + 3γäȧ , which generalizes some of the previous models in the literature. Exact solutions of the field equations are found and discussed the evolution of the Universe. Constraints on the model parameters are obtained from Markov Chain Monte Carlo (MCMC) analysis using the Supernova distance modulus data, observational measurements of Hubble parameter, Baryon acoustic oscillation data. The trajectories of the evolution of the scale factor, deceleration parameter and equation of state parameter are plotted by using best-fit values of the parameters. It is observed that the model shows accelerating behavior and behaves quintessence like (ω > −1). The age of the Universe is obtained which is in good agreement with ΛCDM model. We examine the model using two independent diagnostic parameters, namely statefinder and Om. We apply Akaike information criterion (AI C) and Bayesian information criterion (B I C) to discriminate the model based on the penalization associated to the number of parameters. The analysis shows that the model has close resemblance to the ΛC DM cosmology. We also discuss the thermodynamics of the model and find that the model satisfies the generalized second law of thermodynamics with certain constraints.

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Testing backreaction effects with observational Hubble parameter data

Cited by 17 publications

References 34 publications

Dynamical spatial curvature as a fit to Type Ia supernovae

Dynamical spatial curvature as a fit to Type Ia supernovae

Observational constraints on the jerk parameter with the data of the Hubble parameter

Quintessence behavior via matter creation cosmology

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