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THE DEFLECTION OF THE TWO INTERACTING CORONAL MASS EJECTIONS OF 2010 MAY 23-24 AS REVEALED BY COMBINED IN SITU MEASUREMENTS AND HELIOSPHERIC IMAGING
Lugaz, N1; Farrugia, CJ1; Davies, JA2; Mostl, C3,4,5; Davis, CJ2,6; Ilia I. Roussev7,8; Temmer, M4; Lugaz, N (reprint author), Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA.
发表期刊ASTROPHYSICAL JOURNAL
2012-11-01
卷号759期号:1
DOI10.1088/0004-637X/759/1/68
产权排序第7完成单位
收录类别SCI
关键词Scattering Sun: Corona Sun: Coronal Mass Ejections (Cmes)
摘要In 2010 May 23-24, Solar Dynamics Observatory (SDO) observed the launch of two successive coronal mass ejections (CMEs), which were subsequently tracked by the SECCHI suite on board STEREO. Using the COR2 coronagraphs and the heliospheric imagers (HIs), the initial direction of both CMEs is determined to be slightly west of the Sun-Earth line. We derive the CME kinematics, including the evolution of the CME expansion until 0.4 AU. We find that, during the interaction, the second CME decelerates from a speed above 500 km s(-1) to 380 km s(-1), the speed of the leading edge of the first CME. STEREO observes a complex structure composed of two different bright tracks in HI2-A but only one bright track in HI2-B. In situ measurements from Wind show an "isolated" interplanetary CME, with the geometry of a flux rope preceded by a shock. Measurements in the sheath are consistent with draping around the transient. By combining remote-sensing and in situ measurements, we determine that this event shows a clear instance of deflection of two CMEs after their collision, and we estimate the deflection of the first CME to be about 10 degrees toward the Sun-Earth line. The arrival time, arrival speed, and radius at Earth of the first CME are best predicted from remote-sensing observations taken before the collision of the CMEs. Due to the over-expansion of the CME after the collision, there are few, if any, signs of interaction in in situ measurements. This study illustrates that complex interactions during the Sun-to-Earth propagation may not be revealed by in situ measurements alone.
项目资助者NASA [NAS5-00132, NNX08AQ16G, NNX10AQ29G, NNX12AB28G] ; NSF [AGS-1239699, AGS-1239704] ; CAS at the YNAO [2011T2J01] ; NSF at the IfA [AGS-0639335] ; Austrian Science Fund (FWF) [V195-N16] ; EU ; EU [263252]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
WOS记录号WOS:000310566900068
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]MAGNETIC-FLUX ROPES ; CME-CME INTERACTION ; SOLAR-WIND ; INNER HELIOSPHERE ; 1 AU ; NUMERICAL-SIMULATION ; GEOMAGNETIC STORMS ; INTERACTION EVENT ; STEREO MISSION ; SUN
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6187
专题太阳物理研究组
通讯作者Lugaz, N (reprint author), Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA.
作者单位1.Space Science Center, University of New Hampshire, Durham, NH, USA
2.RAL Space, STFC Rutherford Appleton Laboratory, Chilton, UK
3.Space Science Laboratory, University of California, Berkeley, CA, USA
4.Kanzelhöhe Observatory-IGAM, Institute of Physics, University of Graz, A-8010 Graz, Austria
5.Space Research Institute, Austrian Academy of Science, A-8042 Graz, Austria
6.Department of Meteorology, University of Reading, Berkshire, UK
7.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650011, Yunnan, China
8.Institute for Astronomy, University of Hawaii, Honolulu, HI, USA
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Lugaz, N,Farrugia, CJ,Davies, JA,et al. THE DEFLECTION OF THE TWO INTERACTING CORONAL MASS EJECTIONS OF 2010 MAY 23-24 AS REVEALED BY COMBINED IN SITU MEASUREMENTS AND HELIOSPHERIC IMAGING[J]. ASTROPHYSICAL JOURNAL,2012,759(1).
APA Lugaz, N.,Farrugia, CJ.,Davies, JA.,Mostl, C.,Davis, CJ.,...&Lugaz, N .(2012).THE DEFLECTION OF THE TWO INTERACTING CORONAL MASS EJECTIONS OF 2010 MAY 23-24 AS REVEALED BY COMBINED IN SITU MEASUREMENTS AND HELIOSPHERIC IMAGING.ASTROPHYSICAL JOURNAL,759(1).
MLA Lugaz, N,et al."THE DEFLECTION OF THE TWO INTERACTING CORONAL MASS EJECTIONS OF 2010 MAY 23-24 AS REVEALED BY COMBINED IN SITU MEASUREMENTS AND HELIOSPHERIC IMAGING".ASTROPHYSICAL JOURNAL 759.1(2012).
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