Helioseismic Determination of the Solar Rotation Axis
Helioseismic Determination of the Solar Rotation Axis
复制标题
太阳自转轴的日震测定
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
P. Giles
中科院分区：
文献类型：
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作者：
J. Beck;P. Giles
太阳和日球层天文台航天器上的迈克尔逊多普勒成像仪对多普勒图进行时距日震学分析，提供了对子午流的非常精确的测量。这显示了一个周期为1年的正弦变化，由P. Giles确定，这是由于在确定太阳旋转轴时的错误。经向流量年变化的相位和幅度被用来确定卡灵顿元的误差。在与最近对卡灵顿元素的其他估计进行比较后，我们建议以下值：i = 7。°155±0。°002和Ω = -73。°5±0°1
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: i = 7.°155 ± 0.°002 and Ω = -73.°5 ± 0.°1.