中国空间站大规模多色测光与无缝光谱巡天的设想及其在暗能量研究领域的应用

大型巡天是今后数十年内国际天文学研究的重点方向,高精度大样本的巡天观测将极大地推动暗物质、暗能量、天体起源与演化等天文学和物理学的根本问题的研究.空间站的建设为我国空间天文的发展带来了不可多得的机遇.巡天观测与空间站运行模式相当匹配,而国际上尚未有大型的高分辨率光学与近紫外深度巡天计划,中国空间站正可以在此方向上实现突破,使我国在国际天文界的下一代大规模巡天工作中处于领先地位.本文阐述在空间站上开展大天区面积、高角分辨率、覆盖近紫外-光学-近红外波段的多色测光与无缝光谱巡天的设想,并讨论这个巡天在暗能量研究领域中的应用.

Consideration for a large-scale multi-color imaging and slitless spectroscopy survey on the Chinese space station and its application in dark energy research

Large-scale surveys will be a major effort of the international astronomical community in the next decades. These surveys will produce unprecedentedly large samples with precision measurements and will greatly advance our understanding of fundamental questions of the universe such as dark matter,dark energy,formation and evolution of various astronomical objects. The plan to construct the Chinese space station has brought a rare opportunity for space astronomy in China. Survey observations match well with the operation of the space station,and there has not been a plan for a large-scale high-resolution optical/near UV survey. This can be a unique niche for the astronomy program on board of the Chinese space station and can help China take a leading position in the enterprise of next-generation large-scale surveys. This paper reports the concept of a wide-area high-resolution multiband imaging and slitless spectroscopy survey covering wavelengths from near ultraviolet to near infrared and discusses its application in dark energy research.