A Statistical Study on the Morphology of Rays and Dynamics of Blobs in the Wake of Coronal Mass Ejections
文献类型：期刊论文
| 作者 | Song, H. Q.; Kong, X. L.; Chen, Y.; Li, B.; Li, G.; Feng, S. W.; Xia, L. D. |
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2012 |
| 卷号 | 276期号:1-2页码:261-276 |
| ISSN号 | 0038-0938 |
| 关键词 | Coronal mass ejections Electric currents and current sheets Magnetic reconnection |
| 通讯作者 | 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. |
| 中文摘要 | 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. |
| 英文摘要 | 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. |
| 学科主题 | 空间物理 |
| 资助信息 | NNSFC [41028004, 40825014, 40890162, 40904047, 40974105]; Natural Science Foundation of Shandong Province [ZR2010DQ016]; Independent Innovation Foundation of Shandong University [2010ZRYB001]; Specialized Research Fund for State Key Laboratories in China; A Foundation for the Author of National Excellent Doctoral Dissertation of PR China [2007B24] |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3163]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 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..,...&Xia, L. D..(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. |
入库方式： OAI收割
来源：国家空间科学中心
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