本申请项目内容为研究宇宙速度场特性与理论，在速度空间里探索大尺度结构的形成与演化，分析暗物质、暗晕、星系的本动速度场的统计特性。在大尺度上利用理论、 数值模拟数据分析、观测样本统计分析搜寻速度场所包含的宇宙学信息，发展高效可靠的分析与测量方法。在小尺度主要考察暗晕内暗物质、子结构、重子物质和星系的速度分布情况，研究暗物质性质、气体物理过程对该速度分布的影响，以之为限制暗物质性质、改进星系形成与演化的半解析模型的相关工作提供新的线索。速度空间的大尺度结构研究为星系宇宙学前沿领域的热点方向，本项目的实施预期将取得系列有影响力的成果。

Properties of cosmic velocity field of large scale structures in the universe is capable of providing highly valuable information about physical cosmology and galaxy formation and evolution. We will employ large suites of data of numerical simulation, as well as theoretical modelling and staistical analysis of observational samples, to investigate velocity statistics at large scales of dark matter, dark halo and galaxies, aiming at finding new constraints on cosmological parameters. At small scales, our research will focus on velocity distribution functions inside dark halo of dark matter, sub-structure, baryon matter and galaxies, in attempt to probe dark matter properties through astronomical observation and improve semi-analystical models of galaxy formation and evolution.