STEREO QUADRATURE OBSERVATIONS OF THE THREE-DIMENSIONAL STRUCTURE AND DRIVER OF A GLOBAL CORONAL WAVE

被引：102
作者：
Kienreich, I. W. [1 ]
Temmer, M. [1 ]
Veronig, A. M. [1 ]
机构：
[1] Graz Univ, Inst Phys, IGAM, A-8010 Graz, Austria
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2009年 / 703卷 / 02期
关键词：
Sun: corona; Sun: coronal mass ejections (CMEs); Sun: flares; EIT WAVES; PROPAGATING DISTURBANCE; SOHO/EIT OBSERVATIONS; MASS EJECTION; MORETON WAVES; SOLAR CORONA; MHD WAVES; FLARE; MULTIWAVELENGTH; TRANSIENT;
D O I：
10.1088/0004-637X/703/2/L118
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the first observations of a global coronal wave ("EIT wave") from the two STEREO satellites in quadrature. The wave's initiation site was at the disk center in STEREO-B and precisely on the limb in STEREO-A. These unprecedented observations from the STEREO Extreme Ultraviolet Imaging (EUVI) instruments enable us to gain insight into the wave's kinematics, initiation, and three-dimensional structure. The wave propagates globally over the whole solar hemisphere visible to STEREO-B with a constant velocity of similar to 263 +/- 16 km s(-1). From the two STEREO observations, we derive a height of the wave in the range of similar to 80-100 Mm. Comparison of the wave kinematics with the early phase of the erupting coronal mass ejection (CME) structure indicates that the wave is initiated by the CME lateral expansion, and then propagates freely with a velocity close to the fast magnetosonic speed in the quiet solar corona.
引用
收藏
页码：L118 / L122
页数：5
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