EXTREME-ULTRAVIOLET OBSERVATIONS OF GLOBAL CORONAL WAVE ROTATION

被引：3

作者：

Attrill, G. D. R. ^{[1
]}

Long, D. M. ^{[2
]}

Green, L. M. ^{[2
]}

Harra, L. K. ^{[2
]}

van Driel-Gesztelyi, L. ^{[2
,3
,4
]}

机构：

[1] Dstl Porton Down, Def Sci & Technol Lab, Salisbury SP4 0JQ, Wilts, England

[2] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

[3] Observ Paris, CNRS, LESIA, F-92195 Meudon, France

[4] Hungarian Acad Sci, Konkoly Observ, Budapest, Hungary

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 796卷 / 01期

关键词：

Sun: corona; Sun: coronal mass ejections (CMEs); Sun: magnetic fields; PHOTOSPHERIC FLUX CANCELLATION; 1997 MAGNETIC CLOUD; MASS EJECTION; EIT WAVES; INTERCHANGE RECONNECTION; PROPAGATING DISTURBANCE; SOLAR ERUPTIONS; SOHO MISSION; CME EVENT; STEREO;

D O I：

10.1088/0004-637X/796/1/55

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present evidence of global coronal wave rotation in EUV data from SOHO/EIT, STEREO/EUVI, and SDO/AIA. The sense of rotation is found to be consistent with the helicity of the source region (clockwise for positive helicity, anticlockwise for negative helicity), with the source regions hosting sigmoidal structures. We also study two coronal wave events observed by SDO/AIA where no clear rotation (or sigmoid) is observed. The selected events show supporting evidence that they all originate with flux rope eruptions. We make comparisons across this set of observations (both with and without clear sigmoidal structures). On examining the magnetic configuration of the source regions, we find that the nonrotation events possess a quadrupolar magnetic configuration. The coronal waves that do show a rotation originate from bipolar source regions.

引用

页数：13

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