Appearance of a quark matter phase in hybrid stars
Appearance of a quark matter phase in hybrid stars
复制标题
DOI：
10.1088/1742-6596/509/1/012075
复制
发表时间：
2013-10
期刊：
影响因子：
--
通讯作者：
Tomoki Endo
中科院分区：
文献类型：
--
作者：
Tomoki Endo
混合星核心中夸克物质的出现是这种致密恒星的一个基本问题。这些恒星的中心密度足够高，使得核物质进一步转变为由超子和夸克组成的其他奇异相。然而，高密度物质的状态方程（EOS）仍然不清楚，最近的几次观测表明EOS的局限性，理论研究应试图阐明EOS。人们相信恒星的内部区域应该由强子-夸克混合相组成。考虑到有限尺寸效应，我们研究了强子-夸克混合相，发现混合相应该限制在一个较窄的区域内。因此，夸克物质相应该出现在中心区域。
The appearance of quark matter in the core of hybrid stars is a fundamental issue in such compact stars. The central density of these stars is sufficiently high such that nuclear matter undergoes a further change into other exotic phases that consist of hyperons and quarks. However, the equation of state (EOS) for the high-density matter is still not clear and several recent observations have indicated the limitations of the EOSs; theoretical studies should try to elucidate the EOSs. It is believed that the inner regions of the stars should consist of a mixed hadron-quark phase. We study the mixed hadron-quark phase, taking into account finite-size effects, and find that that the mixed phase should be restricted to a narrower region. Therefore, a quark matter phase should appear in the central region.