Distribution of Helical Properties of Solar Magnetic Fields

被引：0

作者：

Kirill M. Kuzanyan ^{[1
]}

Victor G. Lamburt ^{[1
]}

机构：

[1] National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 IZMIRAN, Heliophysics Lab. Troitsk, Moscow Region, 142190 Russia ,IZMIRAN, Heliophysics Lab. Troitsk, Moscow Region, 142190 Russia Moscow State University, Faculty of Mathemat

来源：

ChineseJournalofAstronomyandAstrophysics | 2003年 / 03期

基金：

中国国家自然科学基金;

关键词：

Sun: activity - Sun: magnetic fields;

D O I：

暂无

中图分类号：

P182.7 [太阳的磁场];

学科分类号：

070401 ;

摘要：

We summarize studies of helical properties of solar magnetic fields such as current helicity and twist of magnetic fields in solar active regions (ARs), that are observational tracers of the alpha-effect in the solar convective zone (SCZ). Information on their spatial distribution is obtained by analysis of systematic mag-netographic observations of active regions taken at Huairou Solar Observing Station of National Astronomical Observatories of Chinese Academy of Sciences. The main property is that the tracers of the alpha-effect are antisymmetric about the solar equator. Identifying longitudinal migration of active regions with their individual rotation rates and taking into account the internal differential rotation law within the SCZ known from helioseismology, we deduce the distribution of the effect over depth. We have found evidence that the alpha-effect changes its value and sign near the bottom of the SCZ, and this is in accord with the theoretical studies and numerical simulations. We discuss

引用

页码：257 / 265

页数：9