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arXiv 2605.21990gr-qc
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广义相对论中球对称完美流体解的热力学可接受性

Thermodynamic acceptability of spherically symmetric perfect-fluid solutions in general relativity

Al-Farabi Kazakh National University(阿拉伯·法拉比哈萨克国立大学);Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México(墨西哥国立自治大学核科学研究所);Dipartimento di Fisica and ICRA, Università di Roma “La Sapienza”(罗马第一大学物理系及ICRA)

Dina Demissenova, Nurzada Beissen, Kuantay Boshkayev, Hernando Quevedo

AI总结:

本文基于热力学考虑扩展了物理可接受性的概念,提出了一套适用于广义相对论恒星模型的热力学可接受条件,并以Tolman IV解为例展示了其热力学一致性。

摘要:

静态球对称完美流体解在相对论天体物理和恒星结构理论中起着核心作用。尽管许多精确解满足爱因斯坦方程的数学条件,但只有有限的子集满足物理上可接受的条件,如正则性、物质变量的正性以及因果声传播。在本工作中,经典的物理可接受性概念被扩展以包含热力学考虑。利用相对论平衡热力学、熵函数和Tolman温度关系,我们为广义相对论恒星模型制定了一套热力学可接受条件。Tolman IV解被作为显式例子进行分析。我们证明该解允许有限且正的平衡熵函数,符合Tolman平衡条件。此分析表明,热力学一致性为Delgaty-Lake可接受性计划提供了自然扩展,并可能在广义相对论内部解的分类中构成基本标准。

英文摘要:

Static spherically symmetric perfect-fluid solutions of Einstein's equations play a central role in relativistic astrophysics and stellar structure theory. While many exact solutions satisfy Einstein's equations mathematically, only a limited subset satisfies physically acceptable conditions such as regularity, positivity of matter variables, and causal sound propagation. In this work, the classical concept of physical acceptability is extended to include thermodynamic considerations. Using relativistic equilibrium thermodynamics, entropy functionals, and the Tolman temperature relation, we formulate a set of thermodynamic acceptability conditions for relativistic stellar models. The Tolman IV solution is analyzed as an explicit example. We show that this solution admits a finite and positive equilibrium entropy functional consistent with the Tolman equilibrium condition. This analysis suggests that thermodynamic consistency provides a natural extension of the Delgaty-Lake acceptability program and may constitute an essential criterion in the classification of relativistic interior solutions.

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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