学术
Formation of the CME Leading Edge Observed in the 2003 February 18 Event
Xing-Ming Bao[1] Hong-Qi Zhang[1] Jun Lin[2,3]
[1]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 [2]National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 [3]Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
文章出处:
《中国天文和天体物理学报：英文版》-2006年6卷6期 -741-750页
分 类 号:
Formation of the CME Leading Edge Observed in the 2003 February 18 Event
Abstract:
This work investigates a typical coronal mass ejection （CME） observed on 2003 February 18, by various space and ground instruments, in white light, Ha, EUV and X- ray. The Ha and EUV images indicate that the CME started with the eruption of a long filament located near the solar northwest limb. The white light coronal images show that the CME initiated with the rarefaction of a region above the solar limb and followed by the formation of a bright arcade at the boundary of the rarefying region at height 0.46 Re above the solar surface. The rarefying process synchronized with the slow rising phase of the eruptive filament, and the CME leading edge was observed to form as the latter started to accelerate. The lower part of the filament brightened in Ha as the filament rose to a certain height and parts of the filament was visible in the GOES X-ray images during the rise. These brightenings imply that the filament may be heated by the magnetic reconnection below the filament in the early stage of the eruption. We suggest that a possible mechanism which leads to the formation of the CME leading edge and cavity is the magnetic reconnection which takes place below the filament after the filament has reached a certain height.[著者文摘]
Key words:
Sun; coronal mass ejections （CMEs） - Sun; filaments - Sun; flares
基金资助:
Supported by the National Natural Science Foundation of China. This work was supported by the National Natural Sciences Foundation of China （NSFC） under Grants 10233050, 10228307, 10611120338 and 10473016, and the National Key Basic Research Program of China under Grants TG 2000078401 and 2006CB806301. JL＇s work at CfA was supported by NASA under the grant NNG06GI88G to the Smithsonian Astrophysical 0bservatory. S0H0 is a project of international cooperation between ESA and NASA.
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