{"title":"Interacting Bianchi Type-V Universe: Observational Constraints","authors":"Archana Dixit, Anirudh Pradhan, K. Ghaderi","doi":"10.1134/S0202289324700282","DOIUrl":null,"url":null,"abstract":"<p>This investigation focuses on a Bianchi type-V universe characterized by spatial homogeneity and anisotropy, wherein the cosmic medium consists of interacting dark matter and holographic dark energy. We obtain solutions to the field equations by considering the Hubble parameter <span>\\(H(z)=(H_{0}/\\sqrt{2})\\sqrt{1+(1+z)^{2n}}\\)</span>, and constrain the model parameters. Employing Bayesian analysis and likelihood functions in conjunction with the Markov Chain Monte Carlo (MCMC) method, we determine the following model parameters: <span>\\(H_{0}=71.3388^{+0.00010}_{-0.00094}\\)</span>, and <span>\\(n=-1.08147^{+0.00010}_{-0.00010}\\)</span>. In this study, we constrain the model parameters by using the joint datasets (<span>\\(H(z)+\\textrm{BAO}+\\textrm{Pantheon}\\)</span>). We explain the physical and geometric aspects of the model. We also examine the behavior of the velocity of sound and different energy conditions to test the viability of our cosmological model.</p>","PeriodicalId":583,"journal":{"name":"Gravitation and Cosmology","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Gravitation and Cosmology","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1134/S0202289324700282","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
This investigation focuses on a Bianchi type-V universe characterized by spatial homogeneity and anisotropy, wherein the cosmic medium consists of interacting dark matter and holographic dark energy. We obtain solutions to the field equations by considering the Hubble parameter \(H(z)=(H_{0}/\sqrt{2})\sqrt{1+(1+z)^{2n}}\), and constrain the model parameters. Employing Bayesian analysis and likelihood functions in conjunction with the Markov Chain Monte Carlo (MCMC) method, we determine the following model parameters: \(H_{0}=71.3388^{+0.00010}_{-0.00094}\), and \(n=-1.08147^{+0.00010}_{-0.00010}\). In this study, we constrain the model parameters by using the joint datasets (\(H(z)+\textrm{BAO}+\textrm{Pantheon}\)). We explain the physical and geometric aspects of the model. We also examine the behavior of the velocity of sound and different energy conditions to test the viability of our cosmological model.
摘要 本研究的重点是以空间均匀性和各向异性为特征的边奇型-V宇宙，其中宇宙介质由相互作用的暗物质和全息暗能量组成。我们通过考虑哈勃参数\(H(z)=(H_{0}/\sqrt{2})\sqrt{1+(1+z)^{2n}}/)得到场方程的解，并对模型参数进行约束。利用贝叶斯分析和似然函数，结合马尔可夫链蒙特卡罗（MCMC）方法，我们确定了以下模型参数：\(H_{0}=71.3388^{+0.00010}_{-0.00094}\), and \(n=-1.08147^{+0.00010}_{-0.00010}\).在这项研究中，我们利用联合数据集（\(H(z)+\textrm{BAO}+\textrm{Pantheon}\）来约束模型参数。）我们解释了模型的物理和几何方面。我们还研究了声速的行为和不同的能量条件，以检验我们的宇宙学模型的可行性。
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 Peoples’ 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
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