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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Heating Titan's upper atmosphere
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Heating Titan's upper atmosphere

机译：加热泰坦的大气层

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摘要

A detailed analysis of the mechanisms heating Titan's neutral atmosphere is provided. Two primary sources of incoming energy, the solar photons and the energetic electrons from Saturn's magnetosphere, are taken into account. The processes studied include the excitation of atmospheric molecules by electron impact, suprathermal electron heating, and the energy release through ion and neutral exothermic chemistry. The redistribution of heat by suprathermal particles throughout the atmosphere is also considered and calculated using a two-stream model. Local time-dependent heating rate profiles are presented. Exothermic chemistry is found to be the dominant source of heat, with electron-impact excitation and suprathermal electron heating becoming significant at high altitudes. Large variations in local peak amplitudes were found, varying between 3 × 10?10 erg cm?3s?1 at 990 km and zenith angle 62° and 7 × 10?12 erg cm?3s?1 at 940 km and zenith angle 165°. Neutral heating efficiency profiles averaged with respect to local time at the fixed latitudes of 38.8° N and 73.7° N are presented, with mean values of 25 ± 15% and 23 ± 19%, respectively.
机译：详细分析的加热机制泰坦的中性大气。主要的能源,太阳能光子和电子从土星的能量磁气圈是考虑。流程包括激励进行了研究大气分子通过电子轰击,suprathermal电子加热,能量通过离子和中性放热的化学。suprathermal粒子在大气中也被认为是和计算使用吗二束模型。概要介绍了。发现是热量的主要来源,电子碰撞激发和suprathermal电子加热成为重要的高海拔。振幅被发现,3×10之间的不同吗?erg厘米3 s ?×10 ?165°。平均相对于当地时间固定纬度38.8°N和73.7°N,平均值的25±15%和23±19%,分别。

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