AI 中文总结
该研究提出双流体史瓦西解模型，用于描述含暗物质的致密星，仅通过引力相互作用的两种流体在特殊参数下可共存于同一区域，且未超过致密性界限，存在流体泄漏的可设想天体。
AI 中文摘要
我们研究内部双流体史瓦西解，这是包含混合暗物质的致密（中子）星模型。两种恒定能量密度将内部史瓦西解推广到仅通过共同引力场相互作用的双流体情况（例如代表标准模型物质和暗物质）。通常，双流体核心被单流体日冕（包层）包围。仅在特殊参数下（模型依赖于流体的能量密度$e_1,e_2$和中心压强$p_{\text{c}1},p_{\text{c}2}$），两种流体占据同一区域。尽管该区域存在两种能量密度之和，但未超过8/9的致密性界限。一种可设想的天体是一种流体（例如暗物质）从双流体核心发生显著泄漏的天体。
英文摘要
We consider the interior two-fluid Schwarzschild solution. That is a model of compact (neutron) stars with admixed dark matter. The two constant energy densities generalize the interior Schwarschild solution to the case of two fluids (representing standard model matter and dark matter, for instance), interacting mutually solely by the common gravitational field. In general, the two-fluid core is surrounded by a one-fluid corona (envelope). Only for special parameters (the model depends on energy densities $e_1,e_2$ and central pressures $p_{\mathrm{c}1},p_{\mathrm{c}2}$ of the fluids), both fluids occupy the same region. Despite the sum of two energy densities in that region, the compactness bound of 8/9 is not exceeded. A conceivable object is one with a stark leakage of one fluid (e.g. dark matter) beyond the two-fluid core.
