High-latitude solar rotation traced by magnetic elements

被引：12
|
作者：
Deng, YY [1 ]
Wang, JX
Harvey, J
机构：
[1] Chinese Acad Sci, Beijing Astron Observ, Beijing 100080, Peoples R China
[2] Natl Opt Astron Observ, Natl Solar Observ, Tucson, AZ 85726 USA
来源：
SOLAR PHYSICS | 1999年 / 186卷 / 1-2期
关键词：
D O I：
10.1023/A:1005186016971
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Sequential observations at Huairou Solar Observation Station, China, and Kitt Peak, U.S.A., show that polar magnetic elements can live from several to more than 58 hours. This enables measurement of the solar rotation rate near the polar region by tracing magnetic element motions. With observations carried out on 8-15 July 1997, we identify and trace more than 1300 elements at north heliographic latitudes between 55 degrees-85 degrees using two methods, and fit the mean sidereal rotation rate as omega = 14.0+/-0.54-(2.24+/-1.22)sin(2)theta - (1.78+/-0.79)sin(4)theta deg per day.
引用
收藏
页码：13 / 23
页数：11
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