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Non-thermal escape on Triton driven by atmospheric and ionospheric chemistry

文献类型：期刊论文

作者Gu, H.4; Cui, J.2,3,4; Niu, D. -D.1; Wu, X. -S.2,4; He, F.5; Wei, Y.5
刊名ASTRONOMY & ASTROPHYSICS
出版日期2021-06-17
卷号650页码:14
ISSN号0004-6361
关键词planets and satellites: atmospheres planets and satellites: individual: Triton
DOI10.1051/0004-6361/202040268
英文摘要Context. Jeans escape is believed to dominate atmospheric escape for most outer Solar System bodies. However, non-thermal mechanisms, particularly atmospheric and ionospheric chemistry, are likely to contribute substantially to neutral escape on Triton.Aims. This study is devoted to evaluating the role of the chemically induced escape of H, H-2, C, N, O, N-2, and CO on Triton via a variety of processes. Here, we also aim to identify the dominant processes for these species.Methods. We used the background atmospheric and ionospheric structures from available model calculations. We constructed a test particle Monte Carlo model to determine the escape probability profiles of various species released from 35 channels. Species-dependent and energy-dependent cross sections were adopted in our calculations, along with a strongly forward-scattering angle distribution, all constrained by the available laboratory measurements.Results. The chemical escape rates on Triton are derived as 4.5 x 10(24) s(-1) for total H, 6.9 x 10(22) s(-1) for total C, 8.0 x 10(24) s(-1) for total N, and 1.4 x 10(23) s(-1) for total O.Conclusions. Based on a comparison with the respective Jeans escape rates, our calculations indicate that atmospheric and ionospheric chemistry make small but non-negligible contributions to both H and C escape on Triton, whereas its contributions to N and O escape are significant.
WOS关键词MONTE-CARLO CALCULATIONS ; PHOTOIONIZATION CROSS-SECTIONS ; EVALUATED KINETIC-DATA ; DISSOCIATIVE RECOMBINATION ; NITROGEN-ATOMS ; THERMAL STRUCTURE ; ENERGY-TRANSFER ; MARS ; NEPTUNE ; METHANE
资助项目Chinese Academy of Sciences (CAS)[XDB41000000] ; Institute of Geology & Geophysics, CAS[IGGCAS-201904] ; National Natural Science Foundation of China[41774186] ; National Natural Science Foundation of China[42030201] ; National Natural Science Foundation of China[41904154] ; China's National Space Administration through the Pre-research Project on Civil Aerospace Technologies[D020105]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者EDP SCIENCES S A
WOS记录号WOS:000664651800002
资助机构Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Institute of Geology & Geophysics, CAS ; Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Pre-research Project on Civil Aerospace Technologies ; China's National Space Administration through the Pre-research Project on Civil Aerospace Technologies ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Institute of Geology & Geophysics, CAS ; Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Pre-research Project on Civil Aerospace Technologies ; China's National Space Administration through the Pre-research Project on Civil Aerospace Technologies ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Institute of Geology & Geophysics, CAS ; Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Pre-research Project on Civil Aerospace Technologies ; China's National Space Administration through the Pre-research Project on Civil Aerospace Technologies ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Institute of Geology & Geophysics, CAS ; Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Pre-research Project on Civil Aerospace Technologies ; China's National Space Administration through the Pre-research Project on Civil Aerospace Technologies
源URL[http://ir.iggcas.ac.cn/handle/132A11/101985]  
专题地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Cui, J.
作者单位1.Harbin Inst Technol, Inst Space Sci & Appl Technol, Shenzhen, Guangdong, Peoples R China
2.Chinese Acad Sci, Ctr Excellence Comparat Planetol, Hefei, Anhui, Peoples R China
3.Chinese Acad Sci, Key Lab Lunar & Deep Space Explorat, Beijing, Peoples R China
4.Sun Yat Sen Univ, Sch Atmospher Sci, Planetary Environm & Astrobiol Res Lab PEARL, Zhuhai, Guangdong, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Gu, H.,Cui, J.,Niu, D. -D.,et al. Non-thermal escape on Triton driven by atmospheric and ionospheric chemistry[J]. ASTRONOMY & ASTROPHYSICS,2021,650:14.
APA Gu, H.,Cui, J.,Niu, D. -D.,Wu, X. -S.,He, F.,&Wei, Y..(2021).Non-thermal escape on Triton driven by atmospheric and ionospheric chemistry.ASTRONOMY & ASTROPHYSICS,650,14.
MLA Gu, H.,et al."Non-thermal escape on Triton driven by atmospheric and ionospheric chemistry".ASTRONOMY & ASTROPHYSICS 650(2021):14.

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来源：地质与地球物理研究所

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