Helioseismic determination of the solar rotation axis

被引：88
|
作者：
Beck, JG [1 ]
Giles, P [1 ]
机构：
[1] Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA
来源：
ASTROPHYSICAL JOURNAL | 2005年 / 621卷 / 02期
基金：
美国国家航空航天局;
关键词：
Sun : helioseismology; Sun : rotation;
D O I：
10.1086/429224
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Time-distance helioseismology analysis of Dopplergrams from the Michelson Doppler Imager instrument on board the Solar and Heliospheric Observatory spacecraft provides a very accurate measurement of meridional flows. This shows a sinusoidal variation with a period of 1 yr and was identified by P. Giles to be due to an error in the determination of the solar rotation axis. The phase and amplitude of the annual variation of meridional flows are used to determine the error in the Carrington elements. After comparing with other recent estimates of the Carrington elements, we suggest the following values: and. i = 7.degrees 155 +/- 0.degrees 002 and Omega = -73.degrees 5 +/- 0.degrees 1.
引用
收藏
页码：L153 / L156
页数：4
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