Titan's corona: The contribution of exothermic chemistry
Titan's corona: The contribution of exothermic chemistry
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DOI：
10.1016/j.icarus.2007.04.031
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发表时间：
2007-11
期刊：
影响因子：
3.2
通讯作者：
V. D. L. Haye;J. Waite;T. Cravens;A. Nagy;Robert E. Johnson;S. Lebonnois;I. Robertson
中科院分区：
文献类型：
--
作者：
V. D. L. Haye;J. Waite;T. Cravens;A. Nagy;Robert E. Johnson;S. Lebonnois;I. Robertson
研究了放热离子和中性化学对土卫六日冕的贡献。利用土卫六上层大气的离子和中性耦合模型，测定了快速中性物质N2、CH4、H、H2、3CH2、CH3、C2H4、C2H5、C2H6、N（4S）、nhh和HCN的生成速率。生产后，使用双流模拟来模拟超热颗粒的形成，因为它们同时通过N2， CH4和H2的热混合物。所得的超热通量、热密度分布和能量分布与De La Haye， V., Waite Jr., j.h., Johnson, r.e., Yelle, r.v., Cravens, t.e., Luhmann, j.g., Kasprzak, w.t., Gell, d.a., Magee, b.b., Leblanc， F., Michael， M., Jurac， S., Robertson, i.p.， 2007年发表的n2和CH4INMS大气层数据进行了比较。j .地球物理学。Res., doi:10.1029/2006JA012222, in press]，并且发现不足以产生测量的超热种群。所有形式的氮原子和碳原子由于放热化学的全球损失估计为8.3×1024Ns−1和7.2×1024Cs−1。
The contribution of exothermic ion and neutral chemistry to Titan's corona is studied. The production rates for fast neutrals N2, CH4, H, H2,3CH2, CH3, C2H4, C2H5, C2H6, N(4S), NH, and HCN are determined using a coupled ion and neutral model of Titan's upper atmosphere. After production, the formation of the suprathermal particles is modeled using a two-stream simulation, as they travel simultaneously through a thermal mixture of N2, CH4, and H2. The resulting suprathermal fluxes, hot density profiles, and energy distributions are compared to the N2and CH4INMS exospheric data presented in [De La Haye, V., Waite Jr., J.H., Johnson, R.E., Yelle, R.V., Cravens, T.E., Luhmann, J.G., Kasprzak, W.T., Gell, D.A., Magee, B., Leblanc, F., Michael, M., Jurac, S., Robertson, I.P., 2007. J. Geophys. Res., doi:10.1029/2006JA012222, in press], and are found insufficient for producing the suprathermal populations measured. Global losses of nitrogen atoms and carbon atoms in all forms due to exothermic chemistry are estimated to be 8.3×1024Ns−1and 7.2×1024Cs−1.