{"title":"Dynamics of Modified Rényi Holographic Dark Energy in Sáez–Ballester Theory of Gravitation","authors":"Jumi Bharali","doi":"10.1134/S0202289324010031","DOIUrl":null,"url":null,"abstract":"<p>The cosmic expansion phenomenon is being studied through the interaction of newly proposed dark energy model (the Modified Rényi holographic dark energy (MRHDE) model) with cold dark matter (CDM) in the framework of Sáez–Ballester (SB) theory of gravitation. To determine the solution of the field equations, the concept of a time-dependent deceleration parameter (DP) is used. The Universe begins with an initial singular state and changes with time from an early deceleration phase to a late acceleration phase. In this paper, it is shown that this expanding solution is stable against perturbations with respect to anisotropic spatial directions. Some important features of the models thus obtained are discussed.</p>","PeriodicalId":583,"journal":{"name":"Gravitation and Cosmology","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2024-04-04","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/S0202289324010031","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
The cosmic expansion phenomenon is being studied through the interaction of newly proposed dark energy model (the Modified Rényi holographic dark energy (MRHDE) model) with cold dark matter (CDM) in the framework of Sáez–Ballester (SB) theory of gravitation. To determine the solution of the field equations, the concept of a time-dependent deceleration parameter (DP) is used. The Universe begins with an initial singular state and changes with time from an early deceleration phase to a late acceleration phase. In this paper, it is shown that this expanding solution is stable against perturbations with respect to anisotropic spatial directions. Some important features of the models thus obtained are discussed.
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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