Physical validity of anisotropic models derived from isotropic fluid dynamics in f(R,T) theory: An implication of gravitational decoupling

IF 3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Tayyab Naseer , G. Mustafa
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引用次数: 0

Abstract

In this paper, we derive multiple anisotropic analogs from the established isotropic model by means of the gravitational decoupling approach in a fluid-geometry interaction based theory. To accomplish this, we initially consider a static spherical perfect-fluid configuration and then introduce a new matter source to induce anisotropic behavior in the system. The resulting field equations encapsulate the entire matter distribution and thus become much complicated. We then split these equations into two sets through implementing a particular transformation, each set delineating characteristics attributed to their original fluid sources. We adopt the Heintzmann’s ansatz and some constraints on extra gravitating source to deal with the first and second systems of equations, respectively. Furthermore, the two fundamental forms of the matching criteria are used to make the constant in the considered solution known. By utilizing the preliminary information of a star candidate LMC X-4, we assess the physical validity of the developed models. Our analysis indicates that both our models exhibit characteristics which are well-agreed with the acceptability criteria for certain parametric values.
f(R,T)理论中由各向同性流体力学导出的各向异性模型的物理有效性:引力解耦的含义
本文采用基于流体几何相互作用理论的引力解耦方法,从已建立的各向同性模型推导出多个各向异性类似物。为了实现这一目标,我们首先考虑一个静态的球形完美流体结构,然后引入一个新的物质源来诱导系统的各向异性行为。所得到的场方程包含了整个物质分布,因此变得非常复杂。然后,我们通过实现特定的变换将这些方程分成两组,每组都描述了归因于其原始流体源的特征。我们分别采用海因茨曼解和额外引力源的一些约束来处理第一和第二方程组。此外,匹配准则的两种基本形式用于使所考虑的解中的常数已知。利用候选恒星LMC X-4的初步信息,我们评估了所建立模型的物理有效性。我们的分析表明,我们的两个模型都表现出与某些参数值的可接受标准非常一致的特征。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Annals of Physics
Annals of Physics 物理-物理:综合
CiteScore
5.30
自引率
3.30%
发文量
211
审稿时长
47 days
期刊介绍: Annals of Physics presents original work in all areas of basic theoretic physics research. Ideas are developed and fully explored, and thorough treatment is given to first principles and ultimate applications. Annals of Physics emphasizes clarity and intelligibility in the articles it publishes, thus making them as accessible as possible. Readers familiar with recent developments in the field are provided with sufficient detail and background to follow the arguments and understand their significance. The Editors of the journal cover all fields of theoretical physics. Articles published in the journal are typically longer than 20 pages.
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