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arXiv 2104.13480hep-phastro-ph.HEgr-qcnucl-th
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来自QCD的中子星径向振荡

Radial oscillations in neutron stars from QCD

José C. Jiménez, Eduardo S. Fraga

摘要:

本文研究了由冷密QCD第一性原理计算得到的一组状态方程产生的中子星在观测数据约束下对无穷小径向振荡的稳定性。我们认为,在可能包含夸克物质核心的恒星中,共形边界$c_{s} = 1/\sqrt{3}$存在轻微和较大的违反。质量-半径图中的某些中子星族由于核附近的大振幅振荡而变得动力学不稳定。

英文摘要:

We study the stability against infinitesimal radial oscillations of neutron stars generated by a set of equations of state obtained from first-principle calculations in cold and dense QCD and constrained by observational data. We consider mild and large violations of the conformal bound, $c_{s} = 1/\sqrt{3}$, in stars that can possibly contain a quark matter core. Some neutron star families in the mass-radius diagram become dynamically unstable due to large oscillation amplitudes near the core.

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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