The Lyman-alpha Solar Telescope (LST) for the ASO-S mission——Ⅰ. Scientific objectives and overview  

作　　者：Hui Li Bo Chen Li Feng Ying Li Yu Huang Jing-Wei Li Lei Lu Jian-Chao Xue Bei-Li Ying Jie Zhao Yu-Tong Yang Wei-Qun Gan Cheng Fang Ke-Fei Song Hong Wang Quan-Feng Guo Ling-Ping He Bo Zhu Cheng Zhu Lei Deng Hai-Chao Bao Cai-Xia Cao Zhong-Guang Yang 

机构地区：[1]Key Laboratory of Dark Matter and Space Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210034,China [2]School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China [3]Changchun Institute of Optics,FineMechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China [4]School of Astronomy and Space Science,Nanjing University,Nanjing 210023,China [5]Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi’an 710119,China [6]Innovation Academy for Microsatellites,Chinese Academy of Sciences,Shanghai 201210,China

出　　处：《Research in Astronomy and Astrophysics》2019年第11期23-32,共10页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.11427803 and U1731241);the CAS Strategic Pioneer Program on Space Science (Grant Nos.XDA04061003, XDA04076100, XDA15052200, XDA15320103 and XDA15320301)

摘　　要：As one of the payloads for the Advanced Space-based Solar Observatory(ASO-S)mission,the Lyman-alpha(Lyα)Solar Telescope(LST)is aimed at imaging the Sun and the inner corona up to 2.5 R⊙(mean solar radius)in both the Lyα(121.6 nm)and visible wavebands with high temporo-spatial resolution,mainly targeting solar flares,coronal mass ejections(CMEs)and filaments/prominences.LST observations allow us to trace solar eruptive phenomena from the disk center to the inner corona,to study the relationships between eruptive prominences/filaments,solar flares and CMEs,to explore the dynamical processes and evolution of solar eruptions,to diagnose solar winds,and to derive physical parameters of the solar atmosphere.LST is actually an instrument suite,which consists of a Solar Disk Imager(SDI),a Solar Corona Imager(SCI),a White-light Solar Telescope(WST)and two Guide Telescopes(GTs).This is the first paper in a series of LST-related papers.In this paper,we introduce the scientific objectives,present an overview of the LST payload and describe the planned observations.The detailed design and data along with potential diagnostics are described in the second(Paper II)and third(Paper III)papers,respectively,appearing in this issue.As one of the payloads for the Advanced Space-based Solar Observatory(ASO-S) mission, the Lyman-alpha(Lyα) Solar Telescope(LST) is aimed at imaging the Sun and the inner corona up to 2.5 R_⊙(mean solar radius) in both the Lyα(121.6 nm) and visible wavebands with high temporo-spatial resolution,mainly targeting solar flares, coronal mass ejections(CMEs) and filaments/prominences. LST observations allow us to trace solar eruptive phenomena from the disk center to the inner corona, to study the relationships between eruptive prominences/filaments, solar flares and CMEs, to explore the dynamical processes and evolution of solar eruptions, to diagnose solar winds, and to derive physical parameters of the solar atmosphere. LST is actually an instrument suite, which consists of a Solar Disk Imager(SDI), a Solar Corona Imager(SCI), a White-light Solar Telescope(WST) and two Guide Telescopes(GTs). This is the first paper in a series of LST-related papers. In this paper, we introduce the scientific objectives, present an overview of the LST payload and describe the planned observations. The detailed design and data along with potential diagnostics are described in the second(Paper II) and third(Paper III) papers, respectively, appearing in this issue.

关 键 词：SUN flares-Sun coronal mass ejections(CMEs)-Sun filaments prominences-Sun corona-Sun chromosphere-Sun UV radiation 

分 类 号：P18[天文地球—天文学]