Monte Carlo calculations of the atmospheric sputtering yields on Titan | |
Gu, H.1; Cui, J.2,3,7; Niu, D. -D.1; Wellbrock, A.4,5; Tseng, W. -L.6; Xu, X. -J.1 | |
刊名 | ASTRONOMY & ASTROPHYSICS |
2019-02-26 | |
卷号 | 623期号:无页码:10 |
关键词 | planets and satellites: individual: Titan planets and satellites: atmospheres |
ISSN号 | 1432-0746 |
DOI | 10.1051/0004-6361/201833761 |
英文摘要 | Context. Sputtering serves as an important mechanism of atmospheric escape in the solar system. Aims. This study is devoted to atmospheric sputtering on Titan, with a special focus on how the N-2 and CH4 sputtering yields respond to varying ion incidence energy and angle, and varying ion mass. Methods. A Monte Carlo model was constructed to track the energy degradation of incident ions and atmospheric recoils from which the sputtering yields were obtained. A large number of model runs were performed, taking into account three categories of incident ion with representative masses of 1, 16, and 28 Da, as well as two collision models both characterized by a strongly forward scattering angle distribution, but different in terms of the inclusion or exclusion of electronic excitation of ambient neutrals. Results. Our model calculations reveal substantial increases in both the N-2 and CH4 sputtering yields with increasing ion incidence energy and angle, and increasing ion mass. The energy distribution of escaping molecules is described reasonably well by a power law, with an enhanced high energy tail for more energetic incident ions and less massive atmospheric recoils. The CH4-to-N-2 sputtering yield ratio is found to range from 10 to 20%, increasing with increasing incidence angle and also increasing with decreasing incidence energy. An approximate treatment of ion impact chemistry is also included in our model, predicting N-2 sputtering yields on Titan that are in broad agreement with previous results. |
资助项目 | Science and Technology Development Fund of Macau SAR (FDCT)[039/2013/A2] ; Science and Technology Development Fund of Macau SAR (FDCT)[082/2015/A3] ; National Science Foundation of China (NSFC)[41525015] ; National Science Foundation of China (NSFC)[41774186] |
WOS关键词 | MAGNETOSPHERIC INTERACTION ; CROSS-SECTIONS ; NITROGEN ; ESCAPE ; ION ; DISSOCIATION ; COLLISIONS ; DIFFUSION ; HYDROGEN ; EXOBASE |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | EDP SCIENCES S A |
WOS记录号 | WOS:000459646400001 |
资助机构 | Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; Science and Technology Development Fund of Macau SAR (FDCT) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) ; National Science Foundation of China (NSFC) |
内容类型 | 期刊论文 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/42021] |
专题 | 中国科学院合肥物质科学研究院 |
通讯作者 | Cui, J. |
作者单位 | 1.Macau Univ Sci & Technol, Space Sci Inst, Macau, Peoples R China 2.Sun Yat Sen Univ, Sch Atmospher Sci, Zhuhai, Guangdong, Peoples R China 3.Chinese Acad Sci, CAS Ctr Excellence Comparat Planetol, Hefei, Anhui, Peoples R China 4.Univ Coll London, Mullard Space Sci Lab, Dorking, Surrey, England 5.Univ Coll London Birkbeck, Ctr Planetary Sci, London, England 6.Natl Taiwan Normal Univ, Dept Earth Sci, Taipei, Taiwan 7.Chinese Acad Sci, CAS Key Lab Lunar & Deep Space Explorat, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Gu, H.,Cui, J.,Niu, D. -D.,et al. Monte Carlo calculations of the atmospheric sputtering yields on Titan[J]. ASTRONOMY & ASTROPHYSICS,2019,623(无):10. |
APA | Gu, H.,Cui, J.,Niu, D. -D.,Wellbrock, A.,Tseng, W. -L.,&Xu, X. -J..(2019).Monte Carlo calculations of the atmospheric sputtering yields on Titan.ASTRONOMY & ASTROPHYSICS,623(无),10. |
MLA | Gu, H.,et al."Monte Carlo calculations of the atmospheric sputtering yields on Titan".ASTRONOMY & ASTROPHYSICS 623.无(2019):10. |
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