Observational constraints for an axially symmetric transitioning model with bulk viscosity parameterization

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-10-01 DOI:10.1016/j.ascom.2023.100768

A. Dixit , A. Pradhan , V.K. Bhardwaj , A. Beesham

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引用次数: 1

Abstract

In this paper, we have analyzed the significance of bulk viscosity in an axially symmetric Bianchi type-I model to study the accelerated expansion of the universe. We have considered four bulk viscosity parameterizations for the matter-dominated cosmological model. The function of the two significant Hubble $H (z)$ and deceleration parameters are discussed in detail. The energy parameters of the universe are computed using the most recent observational Hubble data (57 data points) in the redshift range $0.07 \leq z \leq 2.36$ . In this model, we obtained all feasible solutions with the viscous component and analyzed the universe’s expansion history. Finally, we analyzed the statefinder diagnostic and found some interesting results. The outcomes of our developed model now properly align with observational results.

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具有体粘度参数化的轴对称过渡模型的观测约束

本文分析了体粘度在轴对称Bianchi i型模型中对研究宇宙加速膨胀的意义。我们考虑了物质占主导的宇宙学模型的四种体粘度参数化。详细讨论了两个重要的哈勃H(z)和减速参数的函数。宇宙的能量参数是使用最新的哈勃观测数据(57个数据点)计算的，红移范围为0.07≤z≤2.36。在该模型中，我们得到了具有粘性分量的所有可行解，并分析了宇宙的膨胀历史。最后，我们分析了状态查找器诊断，发现了一些有趣的结果。我们开发的模型的结果现在与观测结果完全一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.