The Dynamic Evolution of Multipoint Interplanetary Coronal Mass Ejections Observed with BepiColombo, Tianwen-1, and MAVEN
The Dynamic Evolution of Multipoint Interplanetary Coronal Mass Ejections Observed with BepiColombo, Tianwen-1, and MAVEN
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DOI：
10.3847/2041-8213/acd7e7
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发表时间：
2023-06
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通讯作者：
Y. Chi;C. Shen;Junyan Liu;Zhihui Zhong;M. Owens;C. Scott;L. Barnard;Bingkun Yu;D. Heyner;H. Auster;I. Richter;Yuming Wang;Tielong Zhang;Jingnan Guo;B. Sánchez–Cano;Z. Pan;Zhuxuan Zou;Mengjiao Xu;Long Cheng;Z. Su;Dongwei Mao;Zhiyong Zhang;Can Wang;Zhiyong Wu;Guoqiang Wang;S. Xiao;Kai Liu;X. Hao;Yiren Li;Manming Chen;M. Lockwood
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作者：
Y. Chi;C. Shen;Junyan Liu;Zhihui Zhong;M. Owens;C. Scott;L. Barnard;Bingkun Yu;D. Heyner;H. Auster;I. Richter;Yuming Wang;Tielong Zhang;Jingnan Guo;B. Sánchez–Cano;Z. Pan;Zhuxuan Zou;Mengjiao Xu;Long Cheng;Z. Su;Dongwei Mao;Zhiyong Zhang;Can Wang;Zhiyong Wu;Guoqiang Wang;S. Xiao;Kai Liu;X. Hao;Yiren Li;Manming Chen;M. Lockwood
我们呈现了2021年12月5日至31日由天问一号和火星大气与挥发物演化航天器在火星和火星上游的BepiColombo（0.56 Au = 0.67 Au）探测到的两次多点行星际日冕物质抛射（ICME）。这是BepiColombo首次作为火星前的上游太阳风监测器，也是天问一号首次用于火星ICME磁场特征研究。利用日球逆风外推时间模型将STEREO/SECCHI和SOHO/LASCO的多次原位观测与日冕观测联系起来。12月4日爆发的第一次快速日冕物质抛射事件（每秒约761.2公里）撞击了火星的中心，并擦过了贝皮科伦坡的西侧。环境缓慢的太阳风使ICME西侧减速，这意味着ICME事件被太阳风结构显著扭曲。第二个缓慢的ICME事件（约390.7 km s−1）经历了从爆发到0.69 Au范围内的加速，然后以环境太阳风的恒定速度行进。这些发现强调了背景太阳风在确定行星际演化和火星距离的ICME全球形态方面的重要性。来自多个地点的观测对火星的空间天气研究非常宝贵，值得今后进行更多的探索。
We present two multipoint interplanetary coronal mass ejections (ICMEs) detected by the Tianwen-1 and Mars Atmosphere and Volatile Evolution spacecraft at Mars and the BepiColombo (0.56 au ∼0.67 au) upstream of Mars from 2021 December 5 to 31. This is the first time that BepiColombo is used as an upstream solar wind monitor ahead of Mars and that Tianwen-1 is used to investigate the magnetic field characteristics of ICMEs at Mars. The Heliospheric Upwind Extrapolation time model was used to connect the multiple in situ observations and the coronagraph observations from STEREO/SECCHI and SOHO/LASCO. The first fast coronal mass ejection event (∼761.2 km s−1), which erupted on December 4, impacted Mars centrally and grazed BepiColombo by its western flank. The ambient slow solar wind decelerated the west flank of the ICME, implying that the ICME event was significantly distorted by the solar wind structure. The second slow ICME event (∼390.7 km s−1) underwent an acceleration from its eruption to a distance within 0.69 au and then traveled with the constant velocity of the ambient solar wind. These findings highlight the importance of background solar wind in determining the interplanetary evolution and global morphology of ICMEs up to Mars distance. Observations from multiple locations are invaluable for space weather studies at Mars and merit more exploration in the future.