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arXiv 1005.4161nucl-thastro-ph.SRhep-ph
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用中子星中r模阻尼研究夸克物质的约束相位

Constraining phases of quark matter with studies of r-mode damping in neutron stars

Gautam Rupak, Prashanth Jaikumar

摘要:

旋转致密星中的r模不稳定性被用来限制高密度物质的相位。在10 ^8 K < T <10^{11} K的温度范围内,考虑了有K介子凝聚(CFL-K 0)和无K介子凝聚(CFL)的色香味锁相。虽然两相中的体积粘度仅在温度T > 10^{11} K时对阻尼r模有效,但CFL-K 0相中的剪切粘度是唯一有效的阻尼剂,一直到温度T > 10 ^8 K,这是冷却中子星的特征。然而,在T ~ 10^8-10^9 K,旋转频率f ~ 56-11 Hz时,它不能阻止恒星变得不稳定,从而发射引力波。快速旋转的中子星排除了几乎完全由CFL或CFL-K 0物质组成的恒星,这表明夸克-强子界面或核壳界面的耗散必须在阻尼不稳定性方面发挥关键作用。

英文摘要:

The r-mode instability in rotating compact stars is used to constrain the phase of matter at high density. The color-flavor-locked phase with kaon condensation (CFL-K0) and without (CFL) is considered in the temperature range 10^8K < T <10^{11} K. While the bulk viscosity in either phase is only effective at damping the r-mode at temperatures T > 10^{11} K, the shear viscosity in the CFL-K0 phase is the only effective damping agent all the way down to temperatures T > 10^8 K characteristic of cooling neutron stars. However, it cannot keep the star from becoming unstable to gravitational wave emission for rotation frequencies f ~ 56-11 Hz at T ~ 10^8-10^9 K. Stars composed almost entirely of CFL or CFL-K0 matter are ruled out by observation of rapidly rotating neutron stars, indicating that dissipation at the quark-hadron interface or nuclear crust interface must play a key role in damping the instability.

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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