摘要
2015年9月28日月基光学望远镜(Lunar-based Ultraviolet Telescope,LUT)在任务期间经历了唯一一次完整的月全食过程,为研究地球对太阳光的几何遮挡是否会对月面辐射环境产生影响提供了难得机遇。首先,利用月食期间连续长达2 h 27 min的电荷耦合器件(Charge-Coupled Device,CCD)天文观测图像,统计分析了月食期间的宇宙线事件计数,发现月食期间宇宙线计数不存在明显变化,在30 s曝光时间内,宇宙线事件平均计数为129.27(±15.78);其次,分析了8月、10~12月采集的CCD暗场图像中的宇宙线事件计数,分别为119.92(±6.37)次、117.00(±10.90)次、118.61(±8.94)次和123.90(±8.92)次,在1σ误差范围内,与月食期间的宇宙线事件计数一致,说明地球对太阳光的几何遮挡对月面辐射环境没有产生明显影响。最后对以上结果进行了分析讨论。
On September 28,2015,the Lunar-based Ultraviolet Telescope(LUT)experienced the only complete lunar eclipse during its mission,which provided a rare opportunity to study whether the Earth′s geometric shielding of sunlight would affect the lunar radiation environment.Firstly,the count of cosmic rays in CCD astronomical images that lasted for 2 hours and 27 minutes during the eclipse was statistically analyzed,and it was found that there was no significant change.Within the 30 second exposure time,the average count of cosmic rays is 129.27(±15.78).Secondly,the count of cosmic rays in dark field images collected in August and October to December were analyzed,which were 119.92(±6.37),117.00(±10.90),118.61(±8.94),123.90(±8.92).Within 1σerror,it is consistent with the count of cosmic rays during the eclipse,indicating that the Earth′s geometric shielding of the sun has no significant effect on the moon′s radiation environment.Finally,the above results were analyzed and discussed.
作者
刘奇
王竞
黄茂海
魏建彦
Liu Qi;Wang Jing;Huang Maohai;Wei Jianyan(Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;University of Chinese Academy of Sciences, Beijing 100049, China;Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, China)
出处
《天文研究与技术》
CSCD
2022年第2期179-188,共10页
Astronomical Research & Technology
基金
国家重点研发计划(2020YFE0202100)
中国科学院战略性先导科技专项(XDA15052600,XDA15016500)资助.
关键词
月面辐射环境
月基光学望远镜
宇宙线
lunar surface radiation environment
lunar-based ultraviolet telescope
cosmic rays
