Hemispheric helicity trend for solar cycle 23

被引：113

作者：

Pevtsov, AA

Canfield, RC

Latushko, SM

机构：

[1] Natl Solar Observ Sacramento Peak, Sunspot, NM 88349 USA

[2] Montana State Univ, Dept Phys, Bozeman, MT 59717 USA

[3] Russian Acad Sci, Inst Solar Terr Phys, Irkutsk 664033, Russia

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 549卷 / 02期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

Sun : activity; Sun : corona; Sun : magnetic fields;

D O I：

10.1086/319179

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Applying the same methods we used in solar cycle 22, we study active region vector magnetograms, full-disk X-ray images, and full-disk line-of-sight magnetograms to derive the helicity of solar magnetic fields in the first 4 years of solar cycle 23. We find that these three data sets all exhibit the same two key tendencies-significant scatter and weak hemispheric asymmetry-as were observed in solar cycle 22. This supports the interpretation of these tendencies as signatures of the writhing of magnetic flux by turbulence in the convection zone.

引用

页码：L261 / L263

页数：3

共 25 条

[1] Electric current helicity in 40 active regions in the maximum of solar cycle 22 [J].