Titan in subsonic and supersonic flow
Titan in subsonic and supersonic flow
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亚音速和超音速流中的泰坦
DOI：
10.1029/2004gl020344
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发表时间：
2004
影响因子：
5.2
通讯作者：
P. Janhunen
中科院分区：
文献类型：
--
作者：
E. Kallio;I. Sillanpää;P. Janhunen
使用全球数值动力学模型研究了泰坦-土星等离子体相互作用。发展的自洽三维准中性混合模型用于研究土卫六与超音速和亚音速等离子体流的相互作用。亚音速流的情况下，代表泰坦在克罗尼亚磁层在旅行者-1飞越。本文用超声速和弱超磁超声速两种情况研究了扰动磁层等离子体流事件。在这两种情况下，磁场都被发现堆积在土卫六上，并在尾流一侧形成磁尾。与超音速情况相反，亚音速流动情况不会在土卫六前方产生弓形激波。在这两种情况下，磁场都有一个面向土星的侧面-反面向土星的侧面不对称。亚音速的情况导致磁尾向土星的扭曲，这与旅行者1号所做的磁场观测定性一致。
The Titan‐Saturn plasma interaction is studied using a global numerical kinetic model. The developed self‐consistent three‐dimensional quasi‐neutral hybrid model is used to study Titan's interaction with supersonic and subsonic plasma flow. The subsonic flow case represents Titan in the Kronian magnetosphere during the Voyager‐1 flyby. The supersonic and weakly supermagnetosonic flow cases are used to study a disturbed magnetospheric plasma flow event. In both cases the magnetic field is found to pile up against Titan and forming a magnetotail on the wake side. The subsonic flow case does not produce a bow shock in front of Titan, in contrast to the supersonic case. The magnetic field is found to have a Saturn facing side‐anti Saturn facing side asymmetry in both cases. The subsonic case resulted in a twisting of the magnetotail toward Saturn that is qualitatively in agreement with the magnetic field observations made by Voyager 1.