The local antimatter fluxes induced by an individual dark matter (DM) substructure can be significantly dependent on the proper motion of the source. We derive analytic solutions to the propagation equation for time-dependent positron and antiproton primary sources, finding that the static limit is a fair approximation only for very high energy particles and nearby sources. We discuss weakly interacting massive particle (WIMP) models fitting the PAMELA positron excess and the FERMI all-electron data. We show that, for a single non-static DM point-source, one cannot extract from the data, in a unique way, model independent particle physics observables, such as the WIMP mass, the pair annihilation cross section, and the annihilation yield. The gamma-ray emission associated to WIMP models inducing a significant local flux of positrons or antiprotons is found to be compatible with EGRET measurements, but it can be definitely singled out with the FERMI-LAT telescope.
Detecting dark matter substructure with lensed quasars in optical bands
National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；School of Astronomy and Space Sciences, University of Chinese Academy of Sciences（中国科学院大学天文与空间科学学院）；School of Physics and Technology, Wuhan University（武汉大学物理科学与技术学院）
Probing Dark Matter Substructure with Image Number Anomaly in Strong Lensing Systems
School of Physics and Technology, Wuhan University（武汉大学物理科学与技术学院）；National Astronomical Observatories, Chinese Academy of Sciences（中国科学院国家天文台）；School of Astronomy and Space Sciences, University of Chinese Academy of Sciences（中国科学院大学天文与空间科学学院）
Dark Shards: velocity substructure from Gaia and direct searches for dark matter
来自盖亚卫星的数据显示，银河系恒星晕的太阳邻域被几次吸积事件的子结构所印记。这些事件的证据被发现在“碎片”，恒星集群与高意义的行动空间和金属丰度。碎片中的恒星有着共同的起源，很可能是银河系的古老卫星星系，因此将嵌入暗物质（DM）中。这些“黑暗碎片”包含两个实质性的流（S1和S2），以及几个逆行，逆行和较低能量的子结构。逆行流S1具有非常高的地球坐标系速度，为$\sim 550$ km s $^{-1}$，而S2则在一个倾斜但极高的轨道上移动，并在大约$300$ km s $^{-1}$处增强了速度分布的峰值。黑暗碎片的存在局部导致许多实验DM信号的基本属性的修改。特别是~S2流在寻找轴子和核反冲的时间依赖性方面产生了一系列效应：改变峰值日，引起非正弦扭曲，并增加了太阳对DM引力聚焦的重要性。黑暗碎片还为定向信号带来了新的功能，同时也增强了对天鹅座的DM通量。
