Streamer Wave Events Observed in Solar Cycle 23
文献类型：期刊论文
| 作者 | Feng, S. W.; Chen, Y.; Li, B.; Song, H. Q.; Kong, X. L.; Xia, L. D.; Feng, X. S. |
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2011 |
| 卷号 | 272期号:1页码:119-136 |
| ISSN号 | 0038-0938 |
| 关键词 | Coronal seismology Waves Magnetic fields Coronal mass ejections propagation corona |
| 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, Peoples R China. |
| 中文摘要 | In this paper we conduct a data survey searching for well-defined streamer wave events observed by the Large Angle and Spectrometric Coronagraph (LASCO) on-board the Solar and Heliospheric Observatory (SOHO) throughout Solar Cycle 23. As a result, eight candidate events are found and presented here. We compare different events and find that in most of them the driving CMEs' ejecta are characterized by a high speed and a wide angular span, and the CME-streamer interactions occur generally along the flank of the streamer structure at an altitude no higher than the bottom of the field of view of LASCO C2. In addition, all front-side CMEs have accompanying flares. These common observational features shed light on the excitation conditions of streamer wave events. We also conduct a further analysis on one specific streamer wave event on 5 June 2003. The heliocentric distances of four wave troughs/crests at various exposure times are determined; they are then used to deduce the wave properties like period, wavelength, and phase speeds. It is found that both the period and wavelength increase gradually with the wave propagation along the streamer plasma sheet, and the phase speed of the preceding wave is generally faster than that of the trailing ones. The associated coronal seismological study yields the radial profiles of the Alfv,n speed and magnetic field strength in the region surrounding the streamer plasma sheet. Both quantities show a general declining trend with time. This is interpreted as an observational manifestation of the recovery process of the CME-disturbed corona. It is also found that the Alfv,nic critical point is at about 10 R(aS (TM)), where the flow speed, which equals the Alfv,n speed, is similar to aEuro parts per thousand 200 km s(-1). |
| 英文摘要 | In this paper we conduct a data survey searching for well-defined streamer wave events observed by the Large Angle and Spectrometric Coronagraph (LASCO) on-board the Solar and Heliospheric Observatory (SOHO) throughout Solar Cycle 23. As a result, eight candidate events are found and presented here. We compare different events and find that in most of them the driving CMEs' ejecta are characterized by a high speed and a wide angular span, and the CME-streamer interactions occur generally along the flank of the streamer structure at an altitude no higher than the bottom of the field of view of LASCO C2. In addition, all front-side CMEs have accompanying flares. These common observational features shed light on the excitation conditions of streamer wave events. We also conduct a further analysis on one specific streamer wave event on 5 June 2003. The heliocentric distances of four wave troughs/crests at various exposure times are determined; they are then used to deduce the wave properties like period, wavelength, and phase speeds. It is found that both the period and wavelength increase gradually with the wave propagation along the streamer plasma sheet, and the phase speed of the preceding wave is generally faster than that of the trailing ones. The associated coronal seismological study yields the radial profiles of the Alfv,n speed and magnetic field strength in the region surrounding the streamer plasma sheet. Both quantities show a general declining trend with time. This is interpreted as an observational manifestation of the recovery process of the CME-disturbed corona. It is also found that the Alfv,nic critical point is at about 10 R(aS (TM)), where the flow speed, which equals the Alfv,n speed, is similar to aEuro parts per thousand 200 km s(-1). |
| 学科主题 | 空间物理 |
| 资助信息 | NNSFC [40825014, 40890162, 40904047]; Foundation for the Author of National Excellent Doctoral Dissertation of PR China [2007B24]; Specialized Research Fund for State Key Laboratory of Space Weather in China; Natural Science Foundation of Shandong Province [ZR2010DQ016]; Independent Innovation Foundation of Shandong University [2010ZRYB001]; [40974105] |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3294]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Feng, S. W.,Chen, Y.,Li, B.,et al. Streamer Wave Events Observed in Solar Cycle 23[J]. SOLAR PHYSICS,2011,272(1):119-136. |
| APA | Feng, S. W..,Chen, Y..,Li, B..,Song, H. Q..,Kong, X. L..,...&Feng, X. S..(2011).Streamer Wave Events Observed in Solar Cycle 23.SOLAR PHYSICS,272(1),119-136. |
| MLA | Feng, S. W.,et al."Streamer Wave Events Observed in Solar Cycle 23".SOLAR PHYSICS 272.1(2011):119-136. |
入库方式： OAI收割
来源：国家空间科学中心
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