基于伽马射线观测间接探测WIMPs暗物质

许多观测现象显示宇宙中存在大量的暗物质，最新的观测表明暗物质约占宇宙的27%，但人们对暗物质粒子的本质几乎是一无所知。申请人拟基于伽马射线数据开展WIMPs暗物质的研究，计划利用Fermi-LAT最新的分析软件、背景模板和超过12年的观测数据，结合DAMPE卫星及其他望远镜的观测数据，搜寻WIMPs暗物质湮灭或衰变产生的伽马射线信号并限制暗物质模型参数。将系统地搜寻矮椭球星系、星系团方向暗物质产生的伽马射线辐射；搜寻WIMPs暗物质湮灭产生的伽马射线线谱信号；利用更多的观测数据，研究伽马射线方面存在的疑似暗物质信号。科学目标是：探测到WIMPs暗物质湮灭或衰变产生的伽马射线信号；准确的限制暗物质湮灭截面和衰变寿命；理解疑似暗物质信号的真实起源。

Many observation phenomena show that there is a large amount of dark matter in the universe, the latest observation suggests that dark matter constitutes about 27% of the universe, but the nature of dark matter particles is still a mystery. The applicant intends to study the WIMPs dark matter based on gamma-ray data. This project plans to search for the gamma-ray signals produced by the annihilation or decay of WIMPs dark matter and constrain the parameters of the dark matter models, based on the latest analysis software, the new background templates and more than 12 years data of Fermi-LAT, combined with the data of DAMPE and other telescopes. We will search for gamma-ray emissions generated by dark matter in the direction of dwarf spheroidal galaxies and galaxy clusters systematically. In addition, the gamma-ray line signals produced by the WIMPs dark matter will be investigated. Furthermore, we will study the suspected gamma-ray signals of dark matter with more data. The main goals are to detect the gamma-ray signals produced by the dark matter annihilation or decay, to constrain the dark matter annihilation cross section and decay lifetime accurately, and to understand the true origin of the possible dark matter signals.