中子星的状态方程和径向振荡

T. Sun, Zi-Yue Zheng, Huan Chen, G. Burgio, H. Schulze
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引用次数: 5

摘要

利用brueckner - hartrei - fock理论中的核物质状态方程和Dyson-Schwinger夸克模型中的夸克物质状态方程,研究了纯中子星和混合星的径向振荡,并对混合星的混合相进行了Gibbs构造。我们计算了特征频率和相应的振荡函数。我们对一阶径向振荡频率零点的计算结果给出了稳定中子星的最大质量,符合常用判据dM/d\rho_c=0$。对径向振荡频率的观测可能有助于更多地了解状态方程,更精确地预测中子星的最大质量,并表明夸克物质的存在。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Equation of state and radial oscillations of neutron stars
We investigate radial oscillations of pure neutron stars and hybrid stars, employing equations of state of nuclear matter from Brueckner-Hartree-Fock theory, and of quark matter from the Dyson-Schwinger quark model, performing a Gibbs construction for the mixed phase in hybrid stars. We calculate the eigenfrequencies and corresponding oscillation functions. Our results for the zero points of the first-order radial oscillation frequencies give the maximum mass of stable neutron stars, consistent with the common criterion $dM/d\rho_c=0$. Possible observations of the radial oscillation frequencies could help to learn more about the equation of state, predict the maximum mass of neutron stars more precisely, and indicate the presence of quark matter.
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