Constraints on the parameterized deceleration parameter in FRW universe

Chaudhary, Himanshu; Bouali, Amine; Debnath, Ujjal; Roy, Tanusree; Mustafa, G.

doi:10.1088/1402-4896/acea02

Cited by 9 publications

(3 citation statements)

References 72 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• Model I (CBDRM): }}CBDRM ′′ (Chaudhary-Bouali-Debnath-Roy-Mustafa)-type parametrization is given by the EoS [83] w(z…”

Section: New Parametrizations Of Dark Energymentioning

confidence: 99%

See 1 more Smart Citation

Exploring Late‐Time Cosmic Acceleration with Eos Parameterizations in Horava‐Lifshitz Gravity via Baryon Acoustic Oscillations

Khurana,

Chaudhary,

Debnath

et al. 2024

Fortschritte der Physik

Self Cite

View full text Add to dashboard Cite

In this study, the framework of Horava‐Lifshitz gravity to model the Universe's dark matter and dark energy (DE) components is adopted. Specifically, two recent parametrizations for DE models: the CBDRM‐type and CADMM‐type parameterizations is considered. In the analysis, the Hubble parameter is explicitly expressed, denoted as , for these two distinct dark energy models. By doing so, investigate and quantify the accelerated cosmic expansion rate characterizing the late‐time Universe is aimed. This study uses a wide range of datasets. This dataset consists of recent measurements of baryon acoustic oscillations (BAOs) collected over a period of 22 years with the Cosmic Chronometers (CC) dataset, Type Ia supernovae (SNIa) dataset, the Hubble diagram of gamma‐ray bursts (GRBs), quasars (Q), and the latest measurement of the Hubble constant (R22). Consequently, a crucial aspect of this study by plotting the vs. H0 plane is presented. In the context of the ΛCDM model, after incorporating all the datasets, including the R22 prior, the following results: H0 = 71.674089 ± 0.734089 and is obtained. For the CBDRM model, H0 = 72.355058 ± 1.004604 and is found. In the case of the CADMM model, the analysis yields H0 = 72.347804 ± 0.923328 and . Cosmographic analyses for both of the proposed parameterizations in comparison to the ΛCDM paradigm are conducted. Additionally, Diagnostic tests to investigate the evolution of both models is applied. Finally, the Information Criteria test demonstrates that the ΛCDM model emerges as the preferred choice among the models is considered.

show abstract

“…• Model I (CBDRM): }}CBDRM ′′ (Chaudhary-Bouali-Debnath-Roy-Mustafa)-type parametrization is given by the EoS [83] w(z…”

Section: New Parametrizations Of Dark Energymentioning

confidence: 99%

“…As a consequence of the above two works, we have considered two parameterizations (CBDRM and CADMM) of the EoS parameter identical to the parametrizations of the deceleration parameter in refs. [82,83]. In HL cosmology, the EoS parameter of modified Chaplygin gas has been explored by various observational constraints.…”

Section: Introductionmentioning

confidence: 99%

Exploring Late‐Time Cosmic Acceleration with Eos Parameterizations in Horava‐Lifshitz Gravity via Baryon Acoustic Oscillations

Khurana,

Chaudhary,

Debnath

et al. 2024

Fortschritte der Physik

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recently, several theoretical models have been developed to analyze the entire evolutionary history of the Universe through parameterization of

q(z)

as a function of scale factor

(a(t))

or time ( t ) or redshift ( z ) in the reference. [ 36–44 ] The following is how this document is organized. In the introduction part, models in modern cosmology are discussed.…”

Section: Introductionmentioning

confidence: 99%

Model‐Independent Study for a Quintessence Model of Dark Energy: Analysis and Observational Constraints

Bouali,

Chaudhary,

Mehrotra

et al. 2023

Fortschritte der Physik

Self Cite

View full text Add to dashboard Cite

In this paper, a well‐motivated parameterization of the Hubble parameter (H) is revisited that renders two models of dark energy showing some intriguing features of the late‐time accelerating Universe. A general quintessence field is considered as a source of dark energy. Tighter constraints using recently updated cosmic observational datasets for the considered models have been obtained. The two models described here show a nice fit to the considered uncorrelated Hubble datasets, Standard candles, Gamma Ray Bursts, Quasars, and uncorrelated Baryonic Acoustic Oscillations datasets. Using the constrained values of the model parameters, some features of the late‐time accelerating models and obtained the present value of the deceleration parameter (q0), the present value of the Hubble parameter (H0) and the transition redshift () from deceleration to acceleration have been discussed. The current value of the deceleration parameter for both models is consistent with the Planck 2018 results. The evolution of the geometrical and physical parameters is discussed through graphical representations for both models with some diagnostic analysis. The statistical analysis performed here shows greater results and overall, the outcomes of this investigation are superior to those previously found.

show abstract

Parametrization of the deceleration parameter in a flat FLRW universe: constraints and comparative analysis with the $$\Lambda $$CDM paradigm

Chaudhary,

Mumtaz,

Bouali

et al. 2023

Gen Relativ Gravit

View full text Add to dashboard Cite

Constraints on the parameterized deceleration parameter in FRW universe

Cited by 9 publications

References 72 publications

Exploring Late‐Time Cosmic Acceleration with Eos Parameterizations in Horava‐Lifshitz Gravity via Baryon Acoustic Oscillations

Exploring Late‐Time Cosmic Acceleration with Eos Parameterizations in Horava‐Lifshitz Gravity via Baryon Acoustic Oscillations

Model‐Independent Study for a Quintessence Model of Dark Energy: Analysis and Observational Constraints

Parametrization of the deceleration parameter in a flat FLRW universe: constraints and comparative analysis with the $$\Lambda $$CDM paradigm

Contact Info

Product

Resources

About