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arXiv 1911.02484gr-qcastro-ph.SR
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能量动量守恒$f(R,T)$引力中的奇异星

Strange stars in energy-momentum-conserved $f(R,T)$ gravity

G. A. Carvalho, S. I. dos Santos,, P. H. R. S. Moraes, M. Malheiro

备注：
preprint version with 14 pages and 3 figures. arXiv admin note: text overlap with arXiv:1803.07719
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摘要：

TOV方程对于精确理解中子星和奇异星等致密天体具有重要意义。因此，在这项工作中，我们得到的TOV方程的能量动量守恒的引力$f(R,T)$理论研究奇异夸克星。$f(R,T)$理论很重要，特别是在宇宙学中，因为它解决了标准模型的某些不完整性。一般来说，在$f(R,T)$引力中不存在能量动量张量的内禀守恒。由于这种守恒在天体物理学中是重要的，我们施加条件$\nabla T_{μν}=0$，这样我们就得到了一个蕴含守恒的函数$f(R,T)$。选择一个保持动量-能量张量的函数$f(R,T)$，在引力和致密物体的微观物理之间产生了强有力的联系。我们通过考虑线性状态方程来描述奇异星内部的物质，如$p=ωρ$和MIT袋模型$p=ω(ρ-4B)$，来获得TOV。有了这些假设，就有可能推导出这些物体的宏观性质。

英文摘要：

For the accurate understanding of compact objects such as neutron stars and strange stars, the Tolmann-Openheimer-Volkof (TOV) equation has proved to be of great use. Hence, in this work, we obtain the TOV equation for the energy-momentum-conserved $f(R,T)$ theory of gravity to study strange quark stars. The $f(R,T)$ theory is important, especially in cosmology, because it solves certain incompleteness of the standard model. In general, there is no intrinsic conservation of the energy-momentum tensor in the $f(R,T)$ gravity. Since this conservation is important in the astrophysical context, we impose the condition $\nabla T_{μν}=0$, so that we obtain a function $f(R,T)$ that implies conservation. This choice of a function $f(R,T)$ that conserves the momentum-energy tensor gives rise to a strong link between gravity and the microphysics of the compact object. We obtain the TOV by taking into account a linear equation of state to describe the matter inside strange stars, such as $p=ωρ$ and the MIT bag model $p=ω(ρ-4B)$. With these assumptions it was possible to derive macroscopic properties of these objects.

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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