Evolution of holographic dark energy with interaction term Q ∝ H ρ de $\boldsymbol {Q\propto H \rho _{\text {de}}}$ and generalized second law

Praseetha, P; Mathew, Titus K.

doi:10.1007/s12043-015-1029-1

Cited by 9 publications

(2 citation statements)

References 42 publications

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“…Various dynamical dark energy models have been proposed to alleviate these issues [11][12][13][14][15][16][17][18]. Quintessence dark energy [19], ghost dark energy model [20,21], holographic model [22,23], k-essence [24], phantom [25], tachyon [26], dilaton [27], quintom [28] and dynamical vacuum energy [29] are few examples of the dynamical DE models. Many of them achieve good consistency with observations.…”

Section: Introductionmentioning

confidence: 99%

Contrasting the bulk viscous model with the standard $Λ$CDM using Bayesian statistics

Shareef¹,

Mohan²,

Mathew³

2021

Preprint

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Causal dissipative model is a plausible choice to explain the late accelerated epoch of universe. At the same time ΛCDM is considered to be standard model to explain the cosmological data corresponding to the late evolution of the universe. We consider a bulk viscus model in which the dissipation is driven by the bulk viscosity ζ = αρ 1/2 , described using the full causal Israel-Stewart theory. We computed the model parameters using the latest observational data (Pantheon). We contrasted this model with ΛCDM model for the late accelerated phase using Bayesian inference method. The Bayes factor has been obtained by calculating the likelihood for Pantheon data. Suitable prior values has been assumed for model parameters for calculating the likelihood. It shows that the evidence for ΛCDM against this viscous model is very strong according to Jeffreys scale.

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Section: Introductionmentioning

confidence: 99%

Contrasting the bulk viscous model with the standard $Λ$CDM using Bayesian statistics

Shareef¹,

Mohan²,

Mathew³

2021

Preprint

Self Cite

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“…The proportionality parameter α determines the strength of the interaction. Praseetha and Mathew adopted this type of interaction in holographic dark energy to check the validity of the generalized second law of thermodynamics at the apparent and event horizon [32] in interacting holographic models. Constraining the coupling parameter is the primary motivation of the present work.…”

Section: Introductionmentioning

confidence: 99%

Holographic dark energy: constraints on the interaction from diverse observational data sets

Mukherjee

Jassal

et al. 2019

Eur. Phys. J. Plus

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The present work deals with holographic dark energy models with Hubble horizon as the infra-red cut-off. The interaction rate between dark energy and dark matter has been reconstructed with three different choices of the interaction term. It is shown that the coupling parameter of the interaction term should evolve with redshift to allow the successful transition from decelerated to accelerated phase of expansion. Constraints on the model parameters are obtained from Markov Chain Monte Carlo (MCMC) analysis using the supernova distance modulus data and observational measurements of the Hubble parameter. Results show that the model with the coupling parameter increasing with redshift (z) or equivalently decreasing with the evolution, are ruled out. On the other hand, coupling parameters, increasing or slowly varying with the evolution, are consistent with the observed evolution scenario. A Bayesian evidence calculation has been carried out for statistical selection of the reconstructed models. Though the kinematical parameters are well behaved for these models, the physical variables which determine the nature of the components in the matter sector, are not at all realistic. We have concluded that the existence of spatial curvature is essential for this particular type of dark energy models. PACS numbers: 98.80.Cq; 98.80.k; 95.36.+x

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Contrasting the bulk viscous model with the standard $\Lambda$CDM using Bayesian statistics

Shareef

Mohan

Mathew

2022

Astrophys Space Sci

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Evolution of holographic dark energy with interaction term Q ∝ H ρ de $\boldsymbol {Q\propto H \rho _{\text {de}}}$ and generalized second law

Cited by 9 publications

References 42 publications

Contrasting the bulk viscous model with the standard $Λ$CDM using Bayesian statistics

Contrasting the bulk viscous model with the standard $Λ$CDM using Bayesian statistics

Holographic dark energy: constraints on the interaction from diverse observational data sets

Contrasting the bulk viscous model with the standard $\Lambda$CDM using Bayesian statistics

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