{"title":"Study of Gravastar in Einstein-Gauss-Bonnet Gravity","authors":"Hasrat Hussain Shah, Hassan Shah, Zahid Ahmad, Manel Hleili, Sardar Muhammad Hussain","doi":"10.1007/s10773-024-05747-z","DOIUrl":null,"url":null,"abstract":"<div><p>The present work investigates a new model of the gravastar in a framework of 5-Dimensional (5D) Einstein-Gauss-Bonnet (EGB) gravitational theory. Adopting the approach of Mazur and Mottala (<i>Proc. Natl. Acad. Sci.</i>, <i>101</i>, 9545–9550, 2001, 2004) we divide the geometry of the stellar spherical object into three different portions, as follows (<i>i</i>) interior portion (<i>ii</i>) intermediate spherical thin shell and (<i>iii</i>) exterior portion. The interior portion contains dark energy having negative pressure. The thin shell region is made up of ultra-relativistic plasma where pressure and energy density are directly proportional. The exterior portion is completely vacuumed. By considering these assumptions, a set of stable and non-singular exact solutions for a gravastar has been investigated. In our model, graphical behavior shows that the obtained solution is physically reasonable and interesting.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"63 10","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Theoretical Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s10773-024-05747-z","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
The present work investigates a new model of the gravastar in a framework of 5-Dimensional (5D) Einstein-Gauss-Bonnet (EGB) gravitational theory. Adopting the approach of Mazur and Mottala (Proc. Natl. Acad. Sci., 101, 9545–9550, 2001, 2004) we divide the geometry of the stellar spherical object into three different portions, as follows (i) interior portion (ii) intermediate spherical thin shell and (iii) exterior portion. The interior portion contains dark energy having negative pressure. The thin shell region is made up of ultra-relativistic plasma where pressure and energy density are directly proportional. The exterior portion is completely vacuumed. By considering these assumptions, a set of stable and non-singular exact solutions for a gravastar has been investigated. In our model, graphical behavior shows that the obtained solution is physically reasonable and interesting.
期刊介绍：
International Journal of Theoretical Physics publishes original research and reviews in theoretical physics and neighboring fields. Dedicated to the unification of the latest physics research, this journal seeks to map the direction of future research by original work in traditional physics like general relativity, quantum theory with relativistic quantum field theory,as used in particle physics, and by fresh inquiry into quantum measurement theory, and other similarly fundamental areas, e.g. quantum geometry and quantum logic, etc.
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