Observations of solar wind ions by the interplanetary spacecraft Suisei (PLANET-A).
Observations of solar wind ions by the interplanetary spacecraft Suisei (PLANET-A).
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星际飞船水星号（PLANET-A）对太阳风离子的观测。
DOI：
10.5636/jgg.39.377
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
K. Hirao
中科院分区：
文献类型：
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作者：
T. Mukai;W. Miyake;T. Terasawa;K. Hirao
介绍了日本行星际航天器Suisei（PLANET-A）进行的太阳风离子测量的概况。仪器和从最初的两个月的观测结果进行了说明。(1)该实验成功地将太阳风离子分解为H+、He++，有时也分解为其他次要成分，如O+6、Si+7、Si+8和铁。这些被认为包含日冕信息的重离子在低速区已被清楚地识别出来。(2)在太阳黑子极小期附近的两个太阳自转期间观测到典型的共转结构。(3)在高速流中观察到了被解释为Alfvenic波动的速度波动。(4)同时还发现，由于流场相互作用产生的压力梯度，太阳风的流动矢量在增速区明显向西偏转。(5)质子的各向异性分布，这可能与当地的磁场也被观察到。
Overview of the solar wind ion measurements which were carried out by the Japanese interplanetary spacecraft Suisei (PLANET-A) is presented. The instrumentation and results obtained from the initial two-month observations are described. (1) The experiment has been successful in resolving solar wind ions into H+, He++, and, sometimes, other minor constituents, such as O+6, Si+7, Si+8, and iron groups. These heavy ions, which are considered to contain information on the solar corona, have been identified clearly in the low-speed region. (2) The typical corotating structure is observed during two solar rotations near the sunspot minimum. (3) Velocity fluctuations which are interpreted to be Alfvenic fluctuations are observed in high speed streams. (4) It is also found that the flow vector of the solar wind is significantly deflected westwards in the region of increasing velocity, as a result of pressure gradient caused by stream interaction. (5) Anisotropic distributions of protons which may be related to the local magnetic field are also observed.