Plasma observation by Suisei of solar-wind interaction with comet Halley
Plasma observation by Suisei of solar-wind interaction with comet Halley
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Suisei对太阳风与哈雷彗星相互作用的等离子体观测
DOI：
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发表时间：
1986
期刊：
影响因子：
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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;M. Kitayama;K. Hirao
1986年3月6日13：06 UT，Suisei探测器1在距离哈雷彗星151，000公里的地方最接近哈雷彗星，在相遇期间，Suisei穿过了一个强相互作用区域，那里的太阳风流受到拾取的离子的严重干扰彗星起源。从水成的等离子体观测清楚地证明了彗星离子在太阳风流中的同化过程的存在。在彗核2.3 × 105 km范围内，可以清楚地看到彗核质子和水族离子速度空间的壳层结构。其他离子，如CO+（和/或N2+）和CH+（和/或C+），也从E/q光谱中确定。在离核4.5 × 105 km处观测到等离子体参数的突变，这可能代表了弓形波的穿越。质量负载效应是在最远101 × 106公里的距离上观测到的。
The Suisei probe1 made a closest approach of 151,000 km to comet Halley at 13:06 UT on 6 March 1986, and during the encounter Suisei passed through a strong interaction region, where the solar-wind flow was severely perturbed by picked-up ions of cometary origin. Plasma observations from Suisei clearly demonstrate the existence of the assimilation process of cometary ions in the solar-wind flow. Within 2.3 × 105 km of the cometary nucleus, shell structures in the velocity space of cometary protons and watergroup ions were clearly seen. Other ions, such as CO+ (and/or N2+) and CH+ (and/or C+), were also identified from the E/q spectrum. An abrupt change of the plasma parameter was detected around 4.5 × 105 km away from the nucleus, which probably represents the bow-wave crossing. The mass-loading effect was observed at a distance of up to ∼1 × 106 km.