CHARACTERISTICS OF KINEMATICS OF A CORONAL MASS EJECTION DURING THE 2010 AUGUST 1 CME-CME INTERACTION EVENT
文献类型：期刊论文
| 作者 | Temmer, Manuela; Vrsnak, Bojan; Rollett, Tanja; Bein, Bianca; de Koning, Curt A.; Liu, Ying; Bosman, Eckhard; Davies, Jackie A.; Moestl, Christian; Zic, Tomislav |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2012 |
| 卷号 | 749期号:1页码:57 |
| 关键词 | Sun: corona Sun: coronal mass ejections (CMEs) |
| ISSN号 | 0004-637X |
| 通讯作者 | Temmer, M (reprint author), Graz Univ, Inst Phys, Kanzelhohe Observ IGAM, Univ Pl 5, A-8010 Graz, Austria. |
| 中文摘要 | We study the interaction of two successive coronal mass ejections (CMEs) during the 2010 August 1 events using STEREO/SECCHI COR and heliospheric imager (HI) data. We obtain the direction of motion for both CMEs by applying several independent reconstruction methods and find that the CMEs head in similar directions. This provides evidence that a full interaction takes place between the two CMEs that can be observed in the HI1 field of view. The full de-projected kinematics of the faster CME from Sun to Earth is derived by combining remote observations with in situ measurements of the CME at 1 AU. The speed profile of the faster CME (CME2; similar to 1200 km s(-1)) shows a strong deceleration over the distance range at which it reaches the slower, preceding CME (CME1; similar to 700 km s(-1)). By applying a drag-based model we are able to reproduce the kinematical profile of CME2, suggesting that CME1 represents a magnetohydrodynamic obstacle for CME2 and that, after the interaction, the merged entity propagates as a single structure in an ambient flow of speed and density typical for quiet solar wind conditions. Observational facts show that magnetic forces may contribute to the enhanced deceleration of CME2. We speculate that the increase in magnetic tension and pressure, when CME2 bends and compresses the magnetic field lines of CME1, increases the efficiency of drag. |
| 英文摘要 | We study the interaction of two successive coronal mass ejections (CMEs) during the 2010 August 1 events using STEREO/SECCHI COR and heliospheric imager (HI) data. We obtain the direction of motion for both CMEs by applying several independent reconstruction methods and find that the CMEs head in similar directions. This provides evidence that a full interaction takes place between the two CMEs that can be observed in the HI1 field of view. The full de-projected kinematics of the faster CME from Sun to Earth is derived by combining remote observations with in situ measurements of the CME at 1 AU. The speed profile of the faster CME (CME2; similar to 1200 km s(-1)) shows a strong deceleration over the distance range at which it reaches the slower, preceding CME (CME1; similar to 700 km s(-1)). By applying a drag-based model we are able to reproduce the kinematical profile of CME2, suggesting that CME1 represents a magnetohydrodynamic obstacle for CME2 and that, after the interaction, the merged entity propagates as a single structure in an ambient flow of speed and density typical for quiet solar wind conditions. Observational facts show that magnetic forces may contribute to the enhanced deceleration of CME2. We speculate that the increase in magnetic tension and pressure, when CME2 bends and compresses the magnetic field lines of CME1, increases the efficiency of drag. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 资助信息 | Austrian Science Fund (FWF) [FWF V195-N16]; European Union [218816, 263252]; Austrian Space Applications Programme [828271 3D-POC]; European Community; NASA TRT [NNX09AJ84G] |
| 语种 | 英语 |
| 公开日期 | 2014-12-15 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/3145]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Temmer, Manuela,Vrsnak, Bojan,Rollett, Tanja,et al. CHARACTERISTICS OF KINEMATICS OF A CORONAL MASS EJECTION DURING THE 2010 AUGUST 1 CME-CME INTERACTION EVENT[J]. ASTROPHYSICAL JOURNAL,2012,749(1):57. |
| APA | Temmer, Manuela.,Vrsnak, Bojan.,Rollett, Tanja.,Bein, Bianca.,de Koning, Curt A..,...&Forsyth, Robert.(2012).CHARACTERISTICS OF KINEMATICS OF A CORONAL MASS EJECTION DURING THE 2010 AUGUST 1 CME-CME INTERACTION EVENT.ASTROPHYSICAL JOURNAL,749(1),57. |
| MLA | Temmer, Manuela,et al."CHARACTERISTICS OF KINEMATICS OF A CORONAL MASS EJECTION DURING THE 2010 AUGUST 1 CME-CME INTERACTION EVENT".ASTROPHYSICAL JOURNAL 749.1(2012):57. |
入库方式： OAI收割
来源：国家空间科学中心
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