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A Statistical Study on the Morphology of Rays and Dynamics of Blobs in the Wake of Coronal Mass Ejections
Song, H. Q.; Kong, X. L.; Chen, Y.; Li, B.; Li, G.; Feng, S. W.; Xia, L. D.; Chen, Y (reprint author), Shandong Univ Weihai, Sch Space Sci & Phys, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Shandong, Peoples R China.
Department空间科学部
Source PublicationSOLAR PHYSICS
2012
Volume276Issue:1-2Pages:261-276
ISSN0038-0938
Language英语
KeywordCoronal Mass Ejections Electric Currents And Current Sheets Magnetic Reconnection
AbstractIn this paper, with a survey through the Large Angle and Spectrometric Coronagraph (LASCO) data from 1996 to 2009, we present 11 events with plasma blobs flowing outwards sequentially along a bright coronal ray in the wake of a coronal mass ejection. The ray is believed to be associated with the current-sheet structure that formed as a result of solar eruption, and the blobs are products of magnetic reconnection occurring along the current sheet. The ray morphology and blob dynamics are investigated statistically. It is found that the apparent angular widths of the rays at a fixed time vary in a range of 2.1 -aEuro parts per thousand 6.6(au <) (2.0 -aEuro parts per thousand 4.4(au <)) with an average of 3.5(au <) (2.9(au <)) at 3R (aS (TM)) (4R (aS (TM))), respectively, and the observed durations of the events vary from 12 h to a few days with an average of 27 h. It is also found, based on the analysis of blob motions, that 58% (26) of the blobs were accelerated, 20% (9) were decelerated, and 22% (10) moved with a nearly constant speed. Comparing the dynamics of our blobs and those that are observed above the tip of a helmet streamer, we find that the speeds and accelerations of the blobs in these two cases differ significantly. It is suggested that these differences of the blob dynamics stem from the associated magnetic reconnection involving different magnetic field configurations and triggering processes.; In this paper, with a survey through the Large Angle and Spectrometric Coronagraph (LASCO) data from 1996 to 2009, we present 11 events with plasma blobs flowing outwards sequentially along a bright coronal ray in the wake of a coronal mass ejection. The ray is believed to be associated with the current-sheet structure that formed as a result of solar eruption, and the blobs are products of magnetic reconnection occurring along the current sheet. The ray morphology and blob dynamics are investigated statistically. It is found that the apparent angular widths of the rays at a fixed time vary in a range of 2.1 -aEuro parts per thousand 6.6(au <) (2.0 -aEuro parts per thousand 4.4(au <)) with an average of 3.5(au <) (2.9(au <)) at 3R (aS (TM)) (4R (aS (TM))), respectively, and the observed durations of the events vary from 12 h to a few days with an average of 27 h. It is also found, based on the analysis of blob motions, that 58% (26) of the blobs were accelerated, 20% (9) were decelerated, and 22% (10) moved with a nearly constant speed. Comparing the dynamics of our blobs and those that are observed above the tip of a helmet streamer, we find that the speeds and accelerations of the blobs in these two cases differ significantly. It is suggested that these differences of the blob dynamics stem from the associated magnetic reconnection involving different magnetic field configurations and triggering processes.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3163
Collection空间科学部
Corresponding AuthorChen, Y (reprint author), Shandong Univ Weihai, Sch Space Sci & Phys, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Shandong, Peoples R China.
Recommended Citation
GB/T 7714
Song, H. Q.,Kong, X. L.,Chen, Y.,et al. A Statistical Study on the Morphology of Rays and Dynamics of Blobs in the Wake of Coronal Mass Ejections[J]. SOLAR PHYSICS,2012,276(1-2):261-276.
APA Song, H. Q..,Kong, X. L..,Chen, Y..,Li, B..,Li, G..,...&Chen, Y .(2012).A Statistical Study on the Morphology of Rays and Dynamics of Blobs in the Wake of Coronal Mass Ejections.SOLAR PHYSICS,276(1-2),261-276.
MLA Song, H. Q.,et al."A Statistical Study on the Morphology of Rays and Dynamics of Blobs in the Wake of Coronal Mass Ejections".SOLAR PHYSICS 276.1-2(2012):261-276.
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