Tsallis holographic dark energy models in Bianchi type space time

Santhi, M. Vijaya; Sobhanbabu, Y.

doi:10.1016/j.newast.2021.101648

Cited by 10 publications

(2 citation statements)

References 64 publications

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“…Jawad et al [48] have discussed cosmological implications of Tsallis DE in modified BD theory. Santhi and Sobhanbabu [49,50] have studied anisotropic THDE models in Scalar tensor theories of gravitation. Sobhanbabu and Santhi [51] have investigated anisotropic MHDE models with sign-changeable interaction in a scalar-tensor theory of gravitation.…”

Section: Body Of the Manuscriptmentioning

confidence: 99%

Kantowski-Sachs Barrow Holographic Dark Energy Model in Saez-Ballester Theory of Gravitation

Sobhanbabu,

Jnana Prasuna,

Satyanarayana

2023

Gravitational Waves - Theory and Observations

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In this Chapter, we have studied a spatially homogeneous and anisotropic Kantowski-Sachs universe in the presence of Barrow holographic dark energy (BHDE) in the background of Saez-Ballester (SB) scalar-tensor theory of gravitation. To find the exact solution of the SB field equations, we have assumed that the shear scalar is directly proportional to expansion scalar. This assumption leads to relation between metric potentials of the models. We have discussed non-interacting and interacting cosmological models. Moreover, we have discussed several cosmological parameters such as energy densities of DM and DE ($\rho_m$ \& $\rho_b$), deceleration $(q)$, equation of state ($\omega_b$) and skewness ($\alpha$) parameters, squared sound speed ($v_s^2$), $\omega_b$-$\omega_b^{'}$ plane statefinders and $Om$-diagnostics parameters through graphical representation for both the interacting models. Also, we have observed that the current values of deceleration and EoS parameters of our constructed models are coincide with the recent observational data.

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Section: Body Of the Manuscriptmentioning

confidence: 99%

Kantowski-Sachs Barrow Holographic Dark Energy Model in Saez-Ballester Theory of Gravitation

Sobhanbabu,

Jnana Prasuna,

Satyanarayana

2023

Gravitational Waves - Theory and Observations

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“…The evolution of cosmological perturbations in THDE models with Hubble horizon and future event horizon as IR cutoff and Bayesian model comparison with ΛCDM as reference model has been scrutinized in [66,67,68]. In [69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86], the THDE model with different IR cutoffs within various modified gravity theories and scalar field theories has also been explored. The growth rate of clustering for different IR cutoffs for the THDE model in the FRW universe can be found in [87].…”

Section: Introductionmentioning

confidence: 99%

Tsallis Holographic Dark Energy Reconsidered

Dheepika,

Mathew

2021

Preprint

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We consider the Interacting Tsallis Holographic Dark Energy (THDE) as dynamical vacuum, with the Granda-Oliveros (GO) scale as the infrared (IR) cutoff. To probe the evolution of the spatially flat Friedmann Lemaître Robertson Walker (FLRW) universe with dark energy and matter components, we analytically solved for the Hubble parameter, and the solution traces the evolutionary path from the prior decelerated to the late accelerated epoch. We used Pantheon Supernovae type Ia and Observational Hubble Data to constrain the free parameters of the model. The estimated values of the cosmological parameters were consistent with observational results. We analysed the behaviour of the model using the statefinder and ω e − ω e plane, and the model shows a quintessence behaviour in general and approach ΛCDM in the future. We performed a dynamical analysis of the model, concluding that the prior decelerated and late accelerated phases are unstable and stable equilibria, respectively. We also investigated the thermodynamical nature of the model and found that the horizon entropy is always an increasing function of time; the generalised second law remains valid in the dynamical vacuum treatment of the model.

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Rényi Holographic Dark Energy Model in a Scalar–Tensor Theory

Santhi¹,

Chinnappalanaidu²

2022

New Astronomy

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Tsallis holographic dark energy models in Bianchi type space time

Cited by 10 publications

References 64 publications

Kantowski-Sachs Barrow Holographic Dark Energy Model in Saez-Ballester Theory of Gravitation

Kantowski-Sachs Barrow Holographic Dark Energy Model in Saez-Ballester Theory of Gravitation

Tsallis Holographic Dark Energy Reconsidered

Rényi Holographic Dark Energy Model in a Scalar–Tensor Theory

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