论文标题
银河系卫星的空间和轨道飞机：不寻常但与$λ$ CDM一致
Spatial and orbital planes of the Milky Way satellites: unusual but consistent with $Λ$CDM
论文作者
论文摘要
我们检查了卫星的空间分布和轨道极相关性，该卫星在一组缩放的高分辨率耗散模拟（MW）尺寸的光环中。我们使用测得的分布来估计卫星构型的发生率，并在其轨道杆分布中作为银河系的卫星系统进行扁平并相关。我们确认，这种发生率对亚李的径向分布敏感，从而对影响它的过程，例如由于中央磁盘而导致的数值效应和破坏而引起的人为破坏。控制分辨率效应并括起磁盘的效果，我们发现MW卫星系统在某种程度上是不寻常的（在$ \ \ \2-3σ$级别上），但在统计学上与$λ$ CDM模型一致，这与其他最近研究的结果和结论一致。
We examine the spatial distribution and orbital pole correlations of satellites in a suite of zoom-in high-resolution dissipationless simulations of Miky Way (MW) sized haloes. We use the measured distribution to estimate the incidence of satellite configurations as flattened and as correlated in their orbital pole distribution as satellite system of the Milky Way. We confirm that this incidence is sensitive to the radial distribution of subhaloes and thereby to the processes that affect it, such as artificial disruption due to numerical effects and disruption due to the central disk. Controlling for the resolution effects and bracketing the effects of the disk, we find that the MW satellite system is somewhat unusual (at the $\approx 2-3σ$ level) but is statistically consistent with the $Λ$CDM model, in general agreement with results and conclusions of other recent studies.
