Heliographic latitude dependence of the dominant polarity of the interplanetary magnetic field
Heliographic latitude dependence of the dominant polarity of the interplanetary magnetic field
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DOI：
10.1029/ja074i024p05611
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发表时间：
1969-11
影响因子：
--
通讯作者：
R. L. Rosenberg;P. Coleman
中科院分区：
文献类型：
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作者：
R. L. Rosenberg;P. Coleman
水手 2、4、5 和 OGO 5 进行的行星际磁场测量涵盖了从 1962 年 9 月至今的多个部分，以及穿过 0.7 至 1.5 天文单位和太阳赤道纬度 ±7.3° 之间区域的几条路径。通过对这些测量的分析，我们发现了磁场中明显的主导极性效应的证据。具体来说，在太阳赤道平面以上的日照纬度处，场的主要极性是向内（朝向太阳），而在该平面以下的纬度处，场的主要极性是向外（远离太阳）。太阳极区的磁力图表明，自 1958 年太阳活动最后一次极大期以来，太阳场的偶极分量在北半球向内，在南半球向外。我们的结果表明，在太阳周期的大部分时间里，行星际空间的北半球或南半球行星际场的主导极性正是同一半球太阳场的偶极分量。
The measurements of the interplanetary magnetic field taken with the Mariners 2, 4, and 5, and OGO 5 cover several parts of the interval from September 1962 to the present and several paths through the region between 0.7 and 1.5 AU and between ±7.3° in solar equatorial latitude. From an analysis of these measurements we find evidence for a distinct dominant polarity effect in the magnetic field. Specifically, the dominant polarity of the field was inward (toward the sun) at heliographic latitudes above the solar equatorial plane and outward (away from the sun) at latitudes below this plane. Magnetographs of the polar regions of the sun indicate that the dipolar component of the sun's field has been inward over the northern hemisphere and outward over the southern hemisphere since the last maximum in solar activity, which occurred in 1958. Our results suggest that over most of a solar cycle, the dominant polarity of the interplanetary field in either the northern or southern hemisphere of interplanetary space is just that of the dipolar component of the sun's field in the same hemisphere.