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arXiv 1603.01239nucl-th
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中子星:用(扩展)Nambu-Jona-Lasinio模型从内壳到核

Neutron stars: from the inner crust to the core with the (Extended) Nambu-Jona-Lasinio model

Helena Pais, Débora P. Menezes, Constança Providência

摘要:

核子物质在su(2)扩展的Nambu-Jona-Lasinio模型中描述。提出了几种具有不同核物质饱和特性的参数化方案。在过饱和,核面食相计算内的两种方法:共存相近似和可压缩液滴模型,与表面张力系数确定使用几何方法在零温度。一个统一的状态方程的恒星物质的内壳,与核面食阶段,和核心的计算。在此框架内的中子星的质量和半径得到了几个家庭的强子和混合星。混合星的夸克相位用包含矢量项的su(3)NJL模型描述。恒星的宏观性质与最近文献中的一些结果是一致的。

英文摘要:

Nucleonic matter is described within a su(2) extended Nambu-Jona-Lasinio model. Several parametrizations with different nuclear matter saturation properties are proposed. At subsaturation, nuclear pasta phases are calculated within two methods: the coexistence-phases approximation and the compressible liquid drop model, with the surface tension coefficient determined using a geometrical approach at zero temperature. An unified equation of state of stellar matter for the inner crust, with the nuclear pasta phases, and the core is calculated. The mass and radius of neutron stars within this framework are obtained for several families of hadronic and hybrid stars. The quark phase of hybrid stars is described within the su(3) NJL model including a vector term. Stellar macroscopic properties are in accordance with some of the recent results in the literature.

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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