Charged particle environment of Titan during the T9 flyby
Charged particle environment of Titan during the T9 flyby
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T9 飞越期间泰坦的带电粒子环境
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
D. Young
中科院分区：
文献类型：
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作者：
K. Szego;Z. Bebesi;C. Bertucci;A. Coates;F. Crary;G. Erdős;R. Hartle;E. Sittler;D. Young
介绍了2005年12月26日，在T9飞掠土卫六时，卡西尼等离子体光谱仪获得的离子测量数据。月球等离子体环境的等离子体流和磁场方向与其他飞越明显不同。近土卫六的环境主要由土卫六的离子组成，具有分裂的特征，每个离子组成不同；第一个区域以16-19和28-40 μ m质量范围内的致密、慢离子和冷离子为主，第二个区域仅含有质量为1和2的离子，密度和慢离子要小得多。磁层离子略微渗透到区域1，而区域2的离子种群是混合的。详细的分析使我们得出结论，第一次事件是由于泰坦地幔的交叉，而第二次很可能是尾流交叉。这种分裂表明土卫六周围离子主导体积的非凸性。详细分析了两种离子分布。
The ion measurements of the Cassini Plasma Spectrometer are presented which were acquired on 26 December 2005, during the T9 flyby at Titan. The plasma flow and magnetic field directions in the distant plasma environment of the moon were distinctly different from the other flybys. The near‐Titan environment, dominated by ions of Titan origin, had a split signature, each with different ion composition; the first region was dominated by dense, slow, and cold ions in the 16–19 and 28–40 amu mass range, the second region contained only ions with mass 1 and 2, much less dense and less slow. Magnetospheric ions penetrate marginally into region 1, whereas the region‐2 ion population is mixed. A detailed analysis has led us to conclude that the first event was due to the crossing of the mantle of Titan, whereas the second one very likely was a wake crossing. The split indicates the non‐convexity of the ion‐dominated volume around Titan. Both ion distributions are analysed in detail.