基于SKA中性氢巡天的暗能量宇宙学研究

The square kilometre array radio telescope (SKA) is the largest integrated aperture radio telescope all over the world planned by the international astronomy community, which will open another new era in the understanding of the universe. SKA will play an important role in the exploration of dark energy essential properties. This project intends to use SKA neutral hydrogen sky survey simulation data to address several key issues of dark energy cosmology, with the aim being to study clearly to what extent the study of dark energy will be pushed by the SKA in the future, which is rather meaningful for dark energy cosmology and SKA science. This project will discuss in depth several key topics in dark energy cosmology: measuring dark energy parameters and neutrino mass based on the SKA neutral hydrogen survey, measuring the coupling parameter between dark energy and dark matter based on the SKA neutral hydrogen survey, and measuring cosmological parameters by combining the SKA neutral hydrogen survey with other future important observation projects. Through the research of these key subjects, we will get the final conclusion. Characteristic and innovation of this project lie in the following points: combining observational research with theoretical analysis; synthetic analysis will be made for several key topics of dark energy cosmology; combining SKA observation with other future important observation projects. This project will promote the development of dark energy cosmology and SKA science.

平方公里阵列射电望远镜（SKA）是国际天文学界计划建造的世界最大综合孔径射电望远镜，将开辟人类认识宇宙的又一新纪元。SKA必将在暗能量本质属性的探索中发挥重要作用。本项目拟利用SKA中性氢巡天模拟数据对暗能量宇宙学的若干关键课题展开深入研究，目标就是研究清楚SKA在未来将把暗能量的研究推进到何种程度，这对于暗能量宇宙学和SKA科学都有重要意义。本项目研究暗能量宇宙学中的几个关键课题：基于SKA中性氢巡天测量暗能量性质与中微子质量；基于SKA中性氢巡天测量暗能量与暗物质的耦合参数；SKA中性氢巡天与其他未来观测项目结合对宇宙学参数的测量。通过这些关键课题的研究，得到最终的研究结论。特色和创新之处在于：将观测研究与理论分析相结合；对暗能量宇宙学的若干关键课题进行通盘分析；将SKA观测与未来其他重要观测项目相结合。本项目研究将推动暗能量宇宙学和SKA科学取得进展。

SKA是国际天文学界计划建造的世界最大综合孔径射电望远镜，它有诸多科学目标，如：宇宙黎明和再电离时期探测；星系演化、宇宙学与暗能量研究；宇宙中性氢大尺度结构巡天与暗能量射电探测；第一代超大质量黑洞探测等。本项目按照研究计划紧密围绕 SKA中性氢巡天观测的宇宙学科学目标研究展开，主要研究内容包括：利用未来中性氢强度映射巡天实验研究暗能量和暗物质相互作用的性质；SKA中性氢巡天观测对中微子质量的限制；联合引力波标准汽笛观测和中性氢强度映射巡天观测打造探索晚期宇宙的精确探针等。我们还研究了LISA-太极网络对引力波源的定位能力，模拟产生亮汽笛引力波-电磁波联合观测数据，开展相关的宇宙学研究。我们把射电探测与引力波、光学巡天相结合，研究宇宙的膨胀历史，以此来探索暗能量的本质等。本项目在ApJ、JCAP、PRD、PLB、SCPMA等国际重要的 SCI 期刊发表论文 34篇。基于本项目的研究，申请了中央高校基本科研业务费1项，参与国家重点研发计划SKA专项项目1项。