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arXiv 2210.13697gr-qcastro-ph.HEhep-phnucl-th
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具有两种暗物质流体的奇异致密天体

Exotic Compact Objects with Two Dark Matter Fluids

Marie Cassing, Alexander Brisebois, Muhammad Azeem, Jürgen Schaffner-Bielich

摘要:

用标度不变量方法研究了由两种不同的暗物质流体构成的致密天体的类属性质。我们调查紧凑的对象与核壳结构,其中两种流体是分开的,并与混合的暗物质组件,其中两个暗物质流体都沉浸在对方。星座被认为是不可压缩的流体,自由和相互作用的费米气体,状态方程与真空项,即自约束的暗物质的组合。我们发现新的功能组合暗物质紧凑的对象,区别于紧凑的对象与一个单一的暗物质流体和紧凑的恒星由普通重子物质,白矮星,中子星和夸克星的质量半径关系。某些组合的暗物质恒星的最大致密性可以达到致密恒星的因果极限,但如果暗物质流体的因果关系得到保证,则不会超过该极限。

英文摘要:

The generic properties of compact objects made of two different fluids of dark matter are studied in a scale invariant approach. We investigate compact objects with a core-shell structure, where the two fluids are separated, and with mixed dark matter components, where both dark matter fluids are immersed within each other. The constellations considered are combinations of incompressible fluids, free and interacting Fermi gases, and equations of state with a vacuum term, i.e. self-bound dark matter. We find novel features in the mass-radius relations for combined dark matter compact objects which distinguishes them from compact objects with a single dark matter fluid and compact stars made of ordinary baryonic matter, as white dwarfs, neutron stars and quark stars. The maximum compactness of certain combined dark matter stars can reach values up to the causality limit for compact stars but not beyond that limit if causality of the dark matter fluids is ensured.

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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