Cosmological Model with Cosmic Transit Behavior in Brans-Dicke Theory

IF 1.2 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Gravitation and Cosmology Pub Date : 2023-11-23 DOI:10.1134/S0202289323040187

Sunil K. Tripathy, Alaka Priyadarsini Sendha, Sasmita Kumari Pradhan, Zashmir Naik, B. Mishra

引用次数: 0

Abstract

We have constructed a dark energy cosmological model in the framework of the generalized Brans Dicke (GBD) theory with a self-interacting potential. The source of dark energy is considered through a unified dark fluid (UDF) characterized by a linear equation of state (EoS). A time-varying deceleration parameter simulating the cosmic transit behavior has been introduced to get the dynamical behavior of the model. The \(H(z)\) data have been explored to constrain the model parameters and to study the dynamical aspects of the Brans-Dicke parameter and the scalar field.

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Brans-Dicke理论中具有宇宙凌日行为的宇宙学模型

我们在广义Brans Dicke (GBD)理论框架下建立了一个具有自相互作用势的暗能量宇宙学模型。暗能量的来源是通过以线性状态方程(EoS)为特征的统一暗流体(UDF)来考虑的。为了得到模型的动力学特性，引入了一个模拟宇宙凌日行为的时变减速参数。研究了\(H(z)\)数据来约束模型参数，并研究了Brans-Dicke参数和标量场的动力学方面。

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来源期刊

Gravitation and Cosmology ASTRONOMY & ASTROPHYSICS-

CiteScore

1.70

自引率

22.20%

发文量

审稿时长

>12 weeks

期刊介绍： Gravitation and Cosmology is a peer-reviewed periodical, dealing with the full range of topics of gravitational physics and relativistic cosmology and published under the auspices of the Russian Gravitation Society and Peoplesâ€™ Friendship University of Russia. The journal publishes research papers, review articles and brief communications on the following fields: theoretical (classical and quantum) gravitation; relativistic astrophysics and cosmology, exact solutions and modern mathematical methods in gravitation and cosmology, including Lie groups, geometry and topology; unification theories including gravitation; fundamental physical constants and their possible variations; fundamental gravity experiments on Earth and in space; related topics. It also publishes selected old papers which have not lost their topicality but were previously published only in Russian and were not available to the worldwide research community