{"title":"On the Influence of Angular Momentum and Dynamical Friction on Structure Formation: III. The Effect of Dark Energy","authors":"Antonino Del Popolo","doi":"10.1134/S1063772924700021","DOIUrl":null,"url":null,"abstract":"<p>We study the effect of modifying the equation of state parameter (<span>\\(w\\)</span>) of dark energy on the results of the previous study [1] (hereafter Paper II), in which dark energy was assumed to be a cosmological constant. As a first step, solving the equation of motion, we found a relation between mass, <span>\\(M\\)</span>, and the turn-around radius, <span>\\({{R}_{0}}\\)</span>. Then, we obtained a relationship between the velocity, <span>\\({v}\\)</span>, and radius, <span>\\(R\\)</span>. The relation was fitted to data of the groups used in Paper II to obtain the Hubble parameter, and the mass, <span>\\(M\\)</span> of the groups. We observe a significant reduction of the mass, <span>\\(M\\)</span>, comparing Paper II results (for which <span>\\(w = - 1\\)</span>) and the case <span>\\(w = - 1{\\text{/}}3\\)</span>, while the Hubble constant increases going from <span>\\(w = - 1\\)</span> to <span>\\(w = - 1{\\text{/}}3\\)</span>.</p>","PeriodicalId":55440,"journal":{"name":"Astronomy Reports","volume":"68 1","pages":"11 - 18"},"PeriodicalIF":1.1000,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astronomy Reports","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063772924700021","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
We study the effect of modifying the equation of state parameter (\(w\)) of dark energy on the results of the previous study [1] (hereafter Paper II), in which dark energy was assumed to be a cosmological constant. As a first step, solving the equation of motion, we found a relation between mass, \(M\), and the turn-around radius, \({{R}_{0}}\). Then, we obtained a relationship between the velocity, \({v}\), and radius, \(R\). The relation was fitted to data of the groups used in Paper II to obtain the Hubble parameter, and the mass, \(M\) of the groups. We observe a significant reduction of the mass, \(M\), comparing Paper II results (for which \(w = - 1\)) and the case \(w = - 1{\text{/}}3\), while the Hubble constant increases going from \(w = - 1\) to \(w = - 1{\text{/}}3\).
期刊介绍:
Astronomy Reports is an international peer reviewed journal that publishes original papers on astronomical topics, including theoretical and observational astrophysics, physics of the Sun, planetary astrophysics, radio astronomy, stellar astronomy, celestial mechanics, and astronomy methods and instrumentation.