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arXiv 2403.03026gr-qcastro-ph.SR
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5维爱因斯坦-高斯-博内引力中的多方星结构

Polytropic stellar structure in 5$\mathcal{D}$ Einstein-Gauss-Bonnet gravity

Akashdip Karmakar, Ujjal Debnath, Pramit Rej

AI总结:

本文在5维爱因斯坦-高斯-博内引力中,利用Finch-Skea假设构建多方星模型,分析耦合常数α对恒星物理参数的影响,并验证该模型满足可接受模型的所有物理标准。

摘要:

多方星是在不涉及复杂恒星模型的情况下了解恒星结构的有用工具。这些模型依赖于恒星压力与密度之间的某种幂律关系。本文提出了一个多方星模型,以利用 Finch-Skea 假设 [M. R. Finch 和 J. E. Skea,《经典与量子引力》6, 467 (1989)] 研究 5 维爱因斯坦-高斯-博内(EGB)引力中的一些新特征。解析结果通过不同高斯-博内耦合常数 α 值下物理参数的图形表示得到更好的描述。本文展示了特定致密天体 EXO 1785-248 的解,其半径 R = 8.849_{-0.04}^{+0.04} km,质量 M = 1.3 ± 0.02 M☉。我们分析了恒星的基本物理属性,揭示了耦合参数 α 对各参数值的影响。最终,我们得出结论,当前模型是现实的,因为它满足可接受模型的所有物理标准。

英文摘要:

Polytropic stars are useful tools for learning about stellar structure without the complexity of comprehensive stellar models. These models rely on a certain power-law correlation between the star's pressure and density. This paper proposes a polytropic star model to investigate some new features in the context of $5\mathcal{D}$ Einstein-Gauss-Bonnet (EGB) gravity using the Finch-Skea {\em ansatz} [{\em M. R. Finch and J. E. Skea, Classical and Quantum Gravity 6, 467 (1989)}]. Analytical results are better described by graphical representations of the physical parameters for various values of the Gauss-Bonnet coupling constant $α$. The solution for a specific compact object, EXO 1785-248, with radius $\mathfrak{R} = 8.849_{-0.04}^{+0.04}$ km and mass $\mathcal{M} = 1.3 \pm 0.02~\mathcal{M}_{\odot}$, is shown here. We analyze the essential physical attributes of the star, which reveal the influence of the coupling parameter $α$ on the values of the parameters. Ultimately, we conclude that our current model is realistic because it satisfies all the physical criteria for an acceptable model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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