Contributions from Different-Type Active Regions Into the Total Solar Unsigned Magnetic Flux

被引:24
作者
Abramenko, V. I. [1 ]
Zhukova, A. V. [1 ]
Kutsenko, A. S. [1 ]
机构
[1] Russian Acad Sci, Crimean Astrophys Observ, UA-298409 Bakhchisaray, Crimea, Ukraine
基金
俄罗斯科学基金会;
关键词
SMALL-SCALE DYNAMO; FIELDS; SUNSPOTS; SURFACE; HELICITY;
D O I
10.1134/S0016793218080224
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Data set acquired by the Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (SDO) during 2010-2017 allowed us to classify active regions (ARs) into three categories: A-type regular bipolar ARs; U-typeunipolar spots; B-typeirregular ARs, violating either Hale polarity law or Joy's law or having the leading spot less than the main following spot. A separate subset of anti-Hale ARs was formed. We selected 1494 ARs in total and found the following: (i) Pearson correlation coefficient r between the total unsigned flux for a given category and the International Sunspot Number smoothly decreases with transition from A-type (r = 0.57) to B-type (r = 0.53) to anti-Hale ARs (r = 0.31) to U-type (r = 0.18); (ii) yearly contributions into the total flux from categories also gradually decreases: from 50-70% from A-type ARs to 20-40% from B-type ARs to 10-20% from U-type ARs to 5-11% from anti-Hale ARs. (iii) At the beginning of the solar minimum, the fraction of flux from anti-Hale groups increased from 5 to 9% and amount of flux per magnetogram was constant at about 10(21) Mx level. The data are compatible with a concept that generation of the magnetic field on the Sun occurs as a united process in a non-linear dynamical dissipative system, i.e., global and local (fluctuation) dynamos are inseparable and operate together. The observed enhancement of the anti-Hale flux during the solar maximum can be due to the combined mechanisms of global mean-field and local fluctuation dynamos.
引用
收藏
页码:1159 / 1169
页数:11
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