论文标题
双层星星的某些特性
Some properties of doubly-degenerate stars
论文作者
论文摘要
我们研究了由冷核物质以及冷费米斯暗物质（DM）组成的双层恒星周围（DDSS）周围的临界质量和圆形测量学。在这里，我们将自身互动的不对称深色费用视为DM候选者。这些恒星具有核心式结构，并根据其信封的组成而被分为重型货舱和DM开发。可以看出，桶装和DM开发的类具有其自身的临界质量，主要由信封中的主要组成部分决定。对于典型的参数集，我们看到两个物种的平衡混合物可能会导致质量较小，而不是该物种占主导地位。 我们还表明，对于真空区域中高度DM的圆形轨道，在真空中终止于最内向的圆形轨道（ISCO），但在DM-Envelope中可能会在ISCO和内部轨道之间形成间隙。
We investigate critical masses of and circular geodesics around doubly-degenerate stars (DDSs) which are composed of cold nuclear matter as well as cold Fermionic dark matter (DM). We here consider asymmetric dark Fermion with self-interaction as a DM candidate. These stars have core-envelope structures and are categorized into baryon-enveloped and DM-enveloped, according to the composition of their envelope. It is seen that the baryon-enveloped and DM-enveloped classes have their own critical masses determined mainly by the dominant component in their envelope. For a typical parameter sets, we see that a balanced mixture of two species may lead to smaller masses than if the either of the species is dominant. We also show that for a highly DM-enveloped case circular orbits in the vacuum region terminates at the innermost stable circular orbit (ISCO) in vacuum, but circular orbits of smaller radius are possible in the DM-envelope forming a gap between the ISCO and the inner orbits.
