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arXiv 2212.04885gr-qc
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具有真实核物质状态方程的快速旋转中子星

Rapidly rotating neutron stars with realistic nuclear matter equation of state

Balázs Kacskovics, Dániel Barta, Mátyás Zsolt Vasúth

AI总结:

研究比较了三种数值代码构建的旋转中子星平衡模型,发现慢旋转近似与快旋转方法在Keplerian频率下的最大质量构型差异达6.67%。

摘要:

我们比较了三种用于构建平衡模型的数值代码:(I)静态平衡构型代码,(II)Hartle-Thorne慢旋转近似实现,(III)由LORENE求解完整爱因斯坦方程的数值解。我们旨在构建在最高至Keplerian频率下均匀旋转的构型序列,使用在两个独立相之间提供平滑过渡的混合强子-夸克物质EOS。我们研究了Hartle-Thorne慢旋转近似实现与LORENE/nrotstar计算结果之间的差异。我们得出结论,代码显示慢旋转与快旋转方法之间的差异呈指数增长,对于以Keplerian频率旋转的最大质量构型达到6.67%。

英文摘要:

We performed a comparison of three different numerical codes for constructing equilibrium models; (I) a code for static equilibrium configurations, (II) an implementation of the Hartle--Thorne slow-rotation approximation, (III) a numerical solution of the full Einstein equations by \texttt{LORENE}. We aimed to construct sequences of uniformly rotating configurations at various rotation frequencies up to the Keplerian frequency for a hybrid hadronic--quark matter EOS where a smooth transition is provided between two separate phases. We investigated the difference of between the results computed by the implementation of Hartle--Thorne slow-rotation approximation and by \texttt{LORENE/nrotstar}, respectively. We have conclude that the codes can the difference between the slow rotating and the fast-rotating approach increase exponentially, reaching 6.67% for the maximal mass configuration rotating at the Keplerian frequency.

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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