扭转和电荷参数对各向异性紧凑星在f(T
IF 5 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Physics of the Dark Universe Pub Date : 2024-07-23 DOI:10.1016/j.dark.2024.101586
S.K. Maurya , Abdelghani Errehymy , Mohammed Daoud , Kairat Myrzakulov , Zhanbala Umbetova

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引用次数: 0

摘要

在线性f(T)函数的假设下,我们提出了f(T)引力背景下各向异性和带电恒星的新精确解。通过对度量势、电荷函数和各向异性函数的解析,我们得到了场问题的精确非奇异解。我们发现各向异性和电荷函数取决于扭转标量的存在,而恒星物质的电荷和各向异性的演化受到扭转参数ζ1变化的显著影响。通过使内部度量解与外部赖斯纳-诺德斯特伦-德西特解相对应,研究了各向异性和边界带电紧凑星的特征。图解显示了推导量的物理有效性,并发现能量条件得到了满足。对于所选的扭转参数值,还验证了因果关系条件、流体静力学稳定平衡和绝热稳定性。分析了 f(T) 引力下带电和各向异性恒星构型的 M-R 关系。研究发现,扭转参数 ζ1 的增大会提高恒星的最大质量,而电荷参数 q0 的增大会降低恒星的最大质量。各向异性通过增加扭转参数产生的影响可能是最大质量超过 2.5 M⊙的一个解释,正如在 GW190814 的次级伴星中观测到的那样。有趣的是,我们的研究揭示了具有线性f(T)引力的f(T)引力场方程的非正弦解的特征。
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Effect of torsion and electric charge parameters on the configuration of anisotropic compact stars in f(T) gravity

Under the assumption of a linear f(T) function, we present a new exact solution for an anisotropic and charged stars in the background of f(T)-gravity. By considering ansatz for the metric potential, charge function, and anisotropy function, we have arrived at an exact and nonsingular solution to the field problem. The anisotropy and charge function are discovered to be contingent upon the existence of the torsion scalar, and the evolution of the charge and anisotropy of the stellar matter is significantly influenced by variations in the torsion parameter ζ1. The features of anisotropy and charged compact star at the boundary are examined by making the interior metric solution correspond to the exterior Reissner-Nordström-de Sitter solution. The physical validity of the derived quantities is shown graphically, and the energy conditions are found to be satisfied. The causality condition, hydrostatic stable equilibrium, and adiabatic stability are also verified for the chosen values of the torsion parameter. The MR relations are analyzed for the charged and anisotropic stellar configurations in f(T)-gravity. It is found that increasing values of the torsion parameter ζ1 enhance the maximum mass of the star while increasing values of the charge parameter q0 decrease the maximum mass. The influence of anisotropy via increasing the torsion parameter could be a probable interpretation of the maximum masses exceeding 2.5 M, as observed in the case of the secondary companion of GW190814. Interestingly, our study sheds light on the characteristic of non-singular solutions to the field equations in f(T)-gravity with linear f(T).

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来源期刊
Physics of the Dark Universe
Physics of the Dark Universe ASTRONOMY & ASTROPHYSICS-
CiteScore
9.60
自引率
7.30%
发文量
118
审稿时长
61 days
期刊介绍: Physics of the Dark Universe is an innovative online-only journal that offers rapid publication of peer-reviewed, original research articles considered of high scientific impact. The journal is focused on the understanding of Dark Matter, Dark Energy, Early Universe, gravitational waves and neutrinos, covering all theoretical, experimental and phenomenological aspects.
期刊最新文献
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