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Study of gravastars under f(T) gravity
Nuclear Physics B ( IF 2.8 ) Pub Date : 2020-03-09 , DOI: 10.1016/j.nuclphysb.2020.114986
Amit Das , Shounak Ghosh , Debabrata Deb , Farook Rahaman , Saibal Ray

In the present paper, we propose a stellar model under the f(T) gravity following the conjecture of Mazur-Mottola [1], [2] known in literature as gravastar, a viable alternative to the black hole. This gravastar has three different regions, viz., (A) Interior core region, (B) Intermediate thin shell, and (C) Exterior spherical region. It is assumed that in the interior region the fluid pressure is equal to a negative matter-energy density providing a constant repulsive force over the spherical thin shell. This shell at the intermediate region is assumed to be formed by a fluid of ultrarelativistic plasma and the pressure, which is directly proportional to the matter-energy density according to Zel'dovich's conjecture of stiff fluid [Zel'dovich (1972) [3]], does nullify the repulsive force exerted by the interior core region for a stable configuration. On the other hand, the exterior spherical region can be described by the exterior Schwarzschild-de Sitter solution. With all these specifications we have found out a set of exact and singularity-free solutions of the gravastar which presents several physically interesting as well as valid features within the framework of alternative gravity.



中文翻译:

重力星的研究 FŤ 重力

在本文中,我们提出了一个恒星模型。 FŤ重力马祖尔-莫托拉的猜想以下的[1],[2]在文献中被称为gravastar,可以替代黑洞。该引力星具有三个不同的区域,即(A)内部核心区域,(B)中间薄壳和(C)外部球形区域。假定在内部区域中流体压力等于负物质能量密度,从而在球形薄壳上提供恒定的排斥力。假定在中间区域的该壳是由超相对论等离子体流体和压力形成的,压力根据Zel'dovich的刚性流体猜想与物质-能量密度成正比[Zel'dovich(1972)[3]。对于稳定的构造,确实消除了由内部芯区域施加的排斥力。另一方面,外部球形区域可以由外部Schwarzschild-de Sitter解决方案描述。

更新日期:2020-03-30
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