利用托尔曼 V 势的修正 f(R, T) 引力中的各向异性夸克星

IF 1.7 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY International Journal of Theoretical Physics Pub Date : 2024-06-12 DOI:10.1007/s10773-024-05686-9
Tayyaba Naz, Adnan Malik, Zenab Ramay
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摘要

目前,替代引力理论是解决一些持久性实验难题(如宇宙暗区)的重要技术。它们也可用于天体宇宙学,产生的结果比使用爱因斯坦广义相对论发现的结果更进一步。在本研究中,我们在修正 f(R, T) 引力的背景下研究了各向异性球对称恒星结构的特征。为了解释紧凑天体的独特特征,我们研究了恒星模型中的流体分布如何受到 MIT 袋模型状态方程的影响。通过使用 Tolman V 度量势,我们建立了场方程,并利用观测到的三颗恒星的实验数据,确定了未知参数的值。通过使用现实的 f(R, T) 模型,我们研究了在特定的 Bag 常量下,上述恒星内核的能量密度、各向异性因子、横向和径向压力的影响。此外,我们还通过平衡条件、能量和因果关系参数来检验宇宙结构的稳定性和我们所建议模型的物理有效性。总之,我们的模型符合物理条件,巴格常数的大小与实验数据一致,证明了模型的可行性。
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Anisotropic Quark Stars in Modified f(R, T) Gravity Utilizing Tolman V potential

Alternative gravity theory is currently an incredibly significant technique for addressing some enduring experimental difficulties, such as the universe’s dark region. They may also be employed in celestial cosmology, producing results that are a stage beyond those found using Einstein’s general relativity. In this study, we examine the characteristics of anisotropic spherically symmetric stellar structures in the context of modified f(RT) gravity. In order to explain the distinctive characteristics of compact objects, we investigate how the fluid distribution in the star model is affected by the MIT bag model equation of state. By using Tolman V metric potentials, we establish the field equations and by employing the experimental data of observed three stars, we identify the values of unknown parameters. By using realistic f(RT) model, we investigate the effect of the energy density, anisotropic factor, transversal and radial pressure within the cores of the aforementioned stars for a particular amount of the Bag constant. Further, we examine the stability of the cosmic structure and the physical validity of our suggested model via equilibrium conditions, energy and causality parameters. To conclude, the physical conditions are fulfilled by our model, and the magnitude of the Bag constant agrees with the experimental data, demonstrating the model’s feasibility.

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来源期刊
CiteScore
2.50
自引率
21.40%
发文量
258
审稿时长
3.3 months
期刊介绍: International Journal of Theoretical Physics publishes original research and reviews in theoretical physics and neighboring fields. Dedicated to the unification of the latest physics research, this journal seeks to map the direction of future research by original work in traditional physics like general relativity, quantum theory with relativistic quantum field theory,as used in particle physics, and by fresh inquiry into quantum measurement theory, and other similarly fundamental areas, e.g. quantum geometry and quantum logic, etc.
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