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arXiv 1006.3758nucl-thastro-ph.SRnucl-ex
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中子星的转动惯量对丰中子物质物态方程的敏感性

Sensitivity of the Moment of Inertia of Neutron Stars to the Equation of State of Neutron-Rich Matter

F. J. Fattoyev, J. Piekarewicz

摘要:

利用精确标定的相对论平均场模型研究了恒星转动惯量对中子星物质状态方程的敏感性。我们探测这种敏感性,通过调整密度依赖的对称性能量和高密度分量的状态方程,属性,目前受到现有的实验室数据的约束很差。特别吸引人的是研究固体地壳中所含的转动惯量的分数。地壳转动惯量的分析处理揭示了核壳界面处的转换压力的高敏感性。这可能表明对称能的密度依赖性与地壳的转动惯量之间存在着很强的相关性。然而,没有发现相关性。我们的结论是,约束的对称能的密度依赖性-通过,例如,在208铅的中子皮厚度的测量-将不会有显着的约束上的过渡压力或地壳的转动惯量。

英文摘要:

The sensitivity of the stellar moment of inertia to the neutron-star matter equation of state is examined using accurately-calibrated relativistic mean-field models. We probe this sensitivity by tuning both the density dependence of the symmetry energy and the high density component of the equation of state, properties that are at present poorly constrained by existing laboratory data. Particularly attractive is the study of the fraction of the moment of inertia contained in the solid crust. Analytic treatments of the crustal moment of inertia reveal a high sensitivity to the transition pressure at the core-crust interface. This may suggest the existence of a strong correlation between the density dependence of the symmetry energy and the crustal moment of inertia. However, no correlation was found. We conclude that constraining the density dependence of the symmetry energy - through, for example, the measurement of the neutron skin thickness in 208Pb - will place no significant bound on either the transition pressure or the crustal moment of inertia.

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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