用150英尺太阳塔望远镜测量的5250埃处Fe I线多普勒频移的太阳经向环流。威尔逊天文台
Solar Meridional Circulation from Doppler Shifts of the Fe I line at lambda 5250 Angstroms as Measured by the 150-foot Solar Tower Telescope at the Mt. Wilson Observatory
摘要：
分析了1986 - 2009年期间获得的全日面Fe I谱线在5250埃处的多普勒频移，以确定太阳表面沿纬向面的环流速度。同时测量的塞曼分裂这条线被用来获得太阳磁场的测量，用于选择低场点和施加磁致多普勒频移的校正。使用的数据来自新的简化，保留了原始观测的全部空间分辨率，以便可以跟踪到北纬80度的环流。推导出的纬向流示出不同的环流速度来自磁图案的运动。在极地地区，连续三个太阳活动极小期的环流模式是相反的。在第22和23个周期的上升阶段，低纬度地区的环流速度出现激增。
英文摘要：
Doppler shifts of the Fe I spectral line at lambda5250 Angstroms from the full solar disk obtained over the period 1986 to 2009 are analyzed to determine the circulation velocity of the solar surface along meridional planes. Simultaneous measurements of the Zeeman splitting of this line are used to obtain measurements of the solar magnetic field that are used to select low field points and impose corrections for the magnetically induced Doppler shift. The data utilized is from a new reduction that preserves the full spatial resolution of the original observations so that the circulation flow can be followed to latitudes of 80 degrees N/S. The deduced meridional flow is shown to differ from the circulation velocities derived from magnetic pattern movements. A reversed circulation pattern is seen in polar regions for three successive solar minima. An surge in circulation velocity at low latitudes is seen during the rising phases of cycles 22 and 23.
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