Constraints on reconstructed dark energy model from SN Ia and BAO/CMB observations

Mamon, Abdulla Al; Bamba, Kazuharu; Das, Sudipta

doi:10.1140/epjc/s10052-016-4590-y

Cited by 67 publications

(43 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This explains both the observed growth of structures at the early times and the late time cosmic acceleration measurements. Also, the transition between the DM era and the THDE era takes place within the redshift interval [0.637,0.962], which are in good compatibility with several recent studies [81][82][83][84][85][86][87][88][89][90]. It is also observed that j stays positive and approaches to the CDM ( j = 1) model as z → −1.…”

Section: Discussionsupporting

confidence: 87%

“…3. From this figure, it is clear that our model can describe the current accelerated universe, and the transition redshift z t (i.e., q(z t ) = 0) from the deceleration phase to an accelerated phase occurs within the intervals [0.637, 0.962] (for upper panel) and [0.776, 0.889] (for lower panel), which are in good agreement with the results, 0.5 < z t < 1, as reported in [81][82][83][84][85][86][87][88][89][90]. The evolution of j (z) has also been plotted in Fig.…”

Section: Interacting Thde With Hubble Cutoffsupporting

confidence: 90%

See 1 more Smart Citation

A generalized interacting Tsallis holographic dark energy model and its thermodynamic implications

2020

Self Cite

View full text Add to dashboard Cite

The present paper deals with a theoretical model for interacting Tsallis holographic dark energy (THDE) whose infrared cut-off scale is set by the Hubble length. The interaction Q between the dark sectors (dark energy and pressureless dark matter) of the universe has been assumed to be non-gravitational in nature. The functional form of Q is chosen in such a way that it reproduces well known and most used interactions as special cases. We then study the nature of the THDE density parameter, the equation of state parameter, the deceleration parameter and the jerk parameter for this interacting THDE model. Our study shows that the universe exhibits the usual thermal history, namely the successive sequence of radiation, dark matter and dark energy epochs, before resulting in a complete dark energy domination in the far future. It is shown the evolution of the Hubble parameter for our model and compared that with the latest Hubble parameter data. Finally, we also investigate both the stability and thermodynamic nature of this model in the present context.

show abstract

Section: Discussionsupporting

confidence: 87%

Section: Interacting Thde With Hubble Cutoffsupporting

confidence: 90%

A generalized interacting Tsallis holographic dark energy model and its thermodynamic implications

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…This approach is an excellent platform to study DE and indeed one may find several attempts in the literature. Specifically, one may use parametric criteria toward reconstructing directly the evolution of DE density ρ de (z) [50][51][52] and the potential of the scalar field [53]. 1 Comparing the two methods, namely w (z) and ρ de (z) for the same observational data sets, it has been found that the latter method leads to tighter constraints on the free parameters than the former [50][51][52].…”

Section: Introductionmentioning

confidence: 99%

Dark energy reconstruction based on the Padé approximation; an expansion around the $$\varLambda $$ Λ CDM

Mehrabi

Basilakos

2018

Eur. Phys. J. C

View full text Add to dashboard Cite

We study the dynamical properties of dark energy based on a large family of Padé parameterizations for which the dark energy density evolves as the ratio between two polynomials in the scale factor of the universe. Using the latest cosmological data we perform a standard likelihood analysis in order to place constraints on the main cosmological parameters of different Padé models. We find that the basic cosmological parameters, namely (Ω m0 , h, σ 8) are practically the same for all Padé parametrizations explored here. Concerning the free parameters which are related to dark energy we show that the best-fit values indicate that the equation of state parameter at the present time is in the phantom regime (w < −1); however, we cannot exclude the possibility of w > −1 at 1σ level. Finally, for the current family of Padé parametrizations we test their ability, via AIC, BIC and Jeffreys' scale, to deviate from ΛCDM cosmology. Among the current Padé parametrizations, the model which contains two dark energy parameters is the one for which a small but nonzero deviation from ΛCDM cosmology is slightly allowed by the AIC test. Moreover, based on Jeffreys' scale we show that a deviation from ΛCDM cosmology is also allowed and thus the possibility of having a dynamical dark energy in the form of Padé parametrization cannot be excluded.

show abstract

“…V φ , ten different quintessence models are suggested by [36]. Here we start from Equation (12) in [37] where…”

Section: ϕCdm Cosmologymentioning

confidence: 99%

Sparse Formulae for the Distance Modulus in Cosmology

Zaninetti¹

2021

JHEPGC

View full text Add to dashboard Cite

We review the distance modulus in twelve different cosmologies: the ΛCDM model, the wCDM model, the Cardassian model, the flat case, the ϕCDM cosmology, the Einstein-De Sitter model, the modified Einstein-De Sitter model, the simple GR model, the flat expanding model, the Milne model, the plasma model and the modified tired light model. The above distance moduli are processed for three different compilations of supernovae and a supernovae + GRBs compilation: Union 2.1, JLA, the Pantheon and Union 2.1 + 59 GRBs. For each of the 48 analysed cases we report the relative cosmological parameters, the chi-square, the reduced chi-square, the AIC and the Q parameter. The angular distance as function of the redshift for five cosmologies is reported in the framework of the minimax approximation.

show abstract

Constraints on reconstructed dark energy model from SN Ia and BAO/CMB observations

Cited by 67 publications

References 73 publications

A generalized interacting Tsallis holographic dark energy model and its thermodynamic implications

A generalized interacting Tsallis holographic dark energy model and its thermodynamic implications

Dark energy reconstruction based on the Padé approximation; an expansion around the $$\varLambda $$ Λ CDM

Sparse Formulae for the Distance Modulus in Cosmology

Contact Info

Product

Resources

About