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Gravastar in the framework of braneworld gravity
Physical Review D ( IF 5 ) Pub Date : 2020-07-10 , DOI: 10.1103/physrevd.102.024037
Rikpratik Sengupta , Shounak Ghosh , Saibal Ray , B. Mishra , S. K. Tripathy

Gravastars have been considered as a serious alternative to black holes in the past couple of decades. Stable models of gravastar have been constructed in many of the alternate gravity models besides standard general relativity (GR). The Randall-Sundrum (RS) braneworld model has been a popular alternative to GR, especially in the cosmological and astrophysical context. Here, we consider a gravastar model in RS brane gravity. The mathematical solutions in different regions have been obtained with calculation of matching conditions. Various important physical parameters for the shell have been calculated and plotted to note their variation with radial distance. We also calculate and plot the surface redshift to provide a very cursory check on the stability of the gravastar within the purview of RS brane gravity.

中文翻译:

braneworld 引力框架中的 Gravastar

在过去的几十年里,Gravastars 被认为是黑洞的重要替代品。除了标准广义相对论 (GR) 之外,在许多替代引力模型中还构建了稳定的引力星模型。Randall-Sundrum (RS) 膜世界模型一直是 GR 的流行替代方案,尤其是在宇宙学和天体物理学背景下。在这里,我们考虑 RS 膜重力中的引力星模型。通过匹配条件的计算,得到了不同区域的数学解。已经计算并绘制了壳的各种重要物理参数,以记录它们随径向距离的变化。我们还计算并绘制了表面红移,以在 RS 膜重力范围内对引力星的稳定性进行非常粗略的检查。
更新日期:2020-07-10
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