A new class of interacting anisotropic cosmological models with time varying quadratic deceleration parameter

Devi, L. Anjana; Singh, S. Surendra; Kumrah, Leishingam

doi:10.1007/s12648-022-02546-2

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…In the accelerating state of the universe, q < 0, strong exponential state when q < −1 and exhibits a deceleration to acceleration transition phase in the era at q = 0. Using (17) and (18) we get…”

Section: Various Parameters Of Cosmological Importancementioning

confidence: 99%

Bianchi Type V Anisotropic Cosmological Model with a Dynamic Cosmological Constant Λ(t) along with Quadratic Deceleration Parameter in f(R, T) Gravity

Koly,

Hossain,

Seum

et al. 2023

Preprint

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The focus of the current research indicates a new Bianchi type-V anisotropic, homogeneous astrophysical model with modified theory of f(R, T) gravity and Λ(t), time-dependent cosmological constant. The significant effect of the model is that the field equations solutions find using a time-dependent quadratic deceleration parameter. We observed anisotropy parameter remains constant both in the belated universe and early universe. The deportment of the equation of state (EOS) parameter, pressure, and energy density, cosmological constant and other parameters are also discussed. This cosmological model indicated the possibility of an accelerating universe with negative pressure, such as a universe dominated by dark energy. Om(z) diagnostic test suggested that the universe starts with quintessence nature and ends as a phantom model. Also, energy conditions of this model are represented here to ensure the model is physically reasonable and based on observations.

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Section: Various Parameters Of Cosmological Importancementioning

confidence: 99%

Bianchi Type V Anisotropic Cosmological Model with a Dynamic Cosmological Constant Λ(t) along with Quadratic Deceleration Parameter in f(R, T) Gravity

Koly,

Hossain,

Seum

et al. 2023

Preprint

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“…By applying a mathematical constraint where the equation of state (EoS) parameter(ω), is directly proportional to the skewness parameter(δ), we obtain the relationship ω + δ = 0 [17].…”

Section: Metric and Field Equations For Bianchi Type-i Universe Modelmentioning

confidence: 99%

“…Cosmological model Bianchi type I describes a spatially homogeneous yet anisotropic world [3]. This model assumes a three-dimensional cosmos that is flat and uniform in one direction but can change in the other two.…”

Section: Introductionmentioning

confidence: 99%

Polynomial Deceleration Parameter Explaining Bianchi Type I Model

Koly,

Hossain,

Seum

et al. 2023

GANIT: J. Bangladesh Math. Soc.

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The focus of the current research investigates the dynamical behavior of the universe within the framework of a new Bianchi type-I anisotropic, homogeneous astrophysical models with a modified theory of f(R, T) gravity. The significant effect of the model is to find solutions to the field equations using Polynomial Deceleration Parameter (PDP) which is a powerful tool to analyze the cosmic expansion history. Through a combination of theoretical analysis and graphical representation, we explore the consequences of f(R, T) gravity on the universe’s evolution for r = 1 to 5 polynomial value of DP. Our study unveils intriguing features in the context of this modified gravity theory, shedding light on its impact on cosmic expansion, acceleration, and potential deviations from standard cosmological models. The graphical representations provide intuitive insights, enhancing our comprehension of the complex interplay between geometry and matter content in the universe. This research contributes to a deeper understanding of the universe’s behavior in alternative gravitational theories. GANIT J. Bangladesh Math. Soc. 43.1 (2023) 08- 25

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Cyclic anisotropic universe in modified gravity with variable deceleration parameter of third degree

Devi,

Singh,

Alam

2023

Afr. Mat.

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A new class of interacting anisotropic cosmological models with time varying quadratic deceleration parameter

Cited by 4 publications

References 35 publications

Bianchi Type V Anisotropic Cosmological Model with a Dynamic Cosmological Constant Λ(<em>t</em>) along with Quadratic Deceleration Parameter in <em>f</em>(R, T) Gravity

Bianchi Type V Anisotropic Cosmological Model with a Dynamic Cosmological Constant Λ(<em>t</em>) along with Quadratic Deceleration Parameter in <em>f</em>(R, T) Gravity

Polynomial Deceleration Parameter Explaining Bianchi Type I Model

Cyclic anisotropic universe in modified gravity with variable deceleration parameter of third degree

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