SOHO EIT observations of coronal holes

被引：0

作者：

Norton, H ^{[1
]}

Newmark, JS ^{[1
]}

Feldman, U ^{[1
]}

机构：

[1] Univ Maryland, College Pk, MD 20742 USA

来源：

8TH SOHO WORKSHOP: PLASMA DYNAMICS AND DIAGNOSTICS IN THE SOLAR TRANSITION REGION AND CORONA, PROCEEDINGS | 1999年 / 446卷

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a study of coronal holes (not including the polar holes) using observations from SOHO EIT during 1996 and 1997. EIT obtains daily full disk observations of the Sun at spectral emission lines from Fe IX,X (171 Angstrom), Fe XII (195 Angstrom), Fe XV (284 Angstrom), and He II (304 Angstrom). Previous studies (mainly He I 10830 Angstrom and ground based magnetograms) have demonstrated the role that bipolar magnetic regions play in the evolution and rotation rates of recurrent coronal holes. We further the correlation between coronal holes and bipolar fields by presenting definitive symbiotic relationships between coronal holes and active regions. Comparisons of EUV observations and magnetograms plus potential field extrapolations are shown. We also investigate the patterns of formation of coronal holes in the quiet sun, and find that there are distinct active longitudes that produce coronal holes.

引用

页码：509 / 513

页数：5

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Rochus, P ;

Chauvineau, JP ;

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Shing, L ;

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