Differential Rotation of Strong Magnetic Flux During Solar Cycles 21-23

被引：3
|
作者：
Song, W. B. [1 ]
Feng, X. S. [1 ]
Shen, F. [1 ]
Guo, J. P. [1 ]
机构：
[1] Chinese Acad Sci, SIGMA Weather Grp, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China
来源：
SOLAR PHYSICS | 2011年 / 270卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Magnetic fields; Rotation; MERIDIONAL MOTIONS; EVOLUTION; FIELDS; SUNSPOTS; RATES; SUN;
D O I：
10.1007/s11207-011-9744-3
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In the present investigation we measure the differential rotation of strong magnetic flux during solar cycles 21 - 23 with the method of wavelet transforms. We find that the cycle-averaged synodic rotation rate of strong magnetic flux can be written as omega=13.47-2.58sin (2) theta or omega=13.45-2.06sin (2) theta-1.37sin (4) theta, where theta is the latitude. They agree well with the results derived from sunspots. A north-south asymmetry of the rotation rate is found at high latitudes (28 degrees <theta < 40 degrees). The strong flux in the southern hemisphere rotates faster than that in the northern hemisphere by 0.2 deg day(-1). The asymmetry continued for cycles 21 -23 and may be a secular property.
引用
收藏
页码：35 / 43
页数：9
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