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Singularity-Free Charged Compact Star Model Under F(Q)-Gravity Regime
Fortschritte der Physik ( IF 3.9 ) Pub Date : 2024-02-27 , DOI: 10.1002/prop.202300229
Sunil Kumar Maurya 1 , Mahmood Khalid Jasim 1 , Abdelghani Errehymy 2 , Kottakkaran Sooppy Nisar 3 , Mona Mahmoud 4 , Riju Nag 1
Affiliation  

In this paper, the possibility of existing a novel class of compact charged spheres based on a charged perfect fluid within the realm of f(Q)$f(Q)$ gravity theory is explored. The authors started by proposing physically meaningful explicit formulas for the potential, denoted λ(r)$\lambda (r)$, and the electric field to find a close-form solution. More precisely, the change of the dependent variable approach by exploiting the transformation Y(r)=eζ(r)/2$Y(r)=e^{\zeta (r)/2}$ is applied. Successively, the field equations analytically are solved and generate the most general solution, which leads us to examine various significant aspects of the stellar system. These aspects comprise the regularity of gravitational potentials, energy density and pressure, electric charge, the mass-radius relationship, subluminal sound velocities in the radial direction, and the adiabatic index for charged compact stars. For a more in-depth system study, mass measurements using contour diagrams are carried out. This mainly involves varying the variable parameters β1$\beta _1$ and E0$E_0$ to distinguish their effect on the mass distribution within the stellar structure. What is more, the electric charge controls the stability of the stellar system is shown, which yields that a stable system can possess a maximum charge of order 1020C$10^{20}\nobreakspace \text{C}$. The results strongly argue that charged stars could conceivably exist in nature and that such a deviation from traditional theories may be seen in future astrophysical observations.

中文翻译:

F(Q)-引力体系下的无奇点带电紧致星模型

在本文中,存在一种基于带电完美流体的新型致密带电球体的可能性F$f(Q)$探索了引力理论。作者首先提出了具有物理意义的势能显式公式,表示为λr$\拉姆达(r)$,和电场来寻找封闭形式的解决方案。更准确地说,通过利用变换来改变因变量方法r=eδr/2$Y(r)=e^{\zeta(r)/2}$被申请;被应用。随后,场方程被解析求解并产生最通用的解,这使我们能够检查恒星系统的各个重要方面。这些方面包括引力势的规律性、能量密度和压力、电荷、质量半径关系、径向的亚光速声速以及带电致密星的绝热指数。为了进行更深入的系统研究,使用等高线图进行质量测量。这主要涉及改变可变参数β1$\beta_1$0$E_0$区分它们对恒星结构内质量分布的影响。更重要的是,电荷控制着恒星系统的稳定性,这表明稳定的系统可以拥有最大的有序电荷1020C$10^{20}\nobreakspace \text{C}$。研究结果有力地证明,带电恒星可能存在于自然界中,并且在未来的天体物理观测中可能会看到这种与传统理论的偏差。
更新日期:2024-02-27
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