KMS National Astronomical Observatories, CAS
| Hydrogen and helium escape on Venus via energy transfer from hot oxygen atoms | |
| Gu, Hao1; Cui, Jun1,2,3; Niu, Dandan4; Yu, Jiang1 | |
| 2021-02-01 | |
| Source Publication | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| ISSN | 0035-8711 |
| Volume | 501Issue:2Pages:2394-2402 |
| Abstract | Due to the relatively strong gravity on Venus, heavy atmospheric neutrals are difficult to accelerate to the escape velocity. However, a variety of processes, such as the dissociative recombination of ionospheric O-2(+), are able to produce hot atoms which could deliver a significant amount of energy to light neutrals and drive their escape. In this study, we construct a Monte Carlo model to simulate atmospheric escape of three light species, H, H-2, and He, on Venus via such a knock-on process. Two Venusian background atmosphere models are adopted, appropriate for solar minimum and maximum conditions. Various energy-dependent and species-dependent cross-sections, along with a common strongly forward scattering angle distribution, are used in our calculations. Our model results suggest that knock-on by hot O likely plays the dominant role in driving total atmospheric hydrogen and helium escape on Venus at the present epoch, with a significant portion contributed from regions below the exobase. Substantial variations are also revealed by our calculations. Of special interest is the modelled reduction in escape flux at high solar activities for all species, mainly associated with the enhancement in thermal O concentration near the exobase at high solar activities which hinders escape. Finally, model uncertainties due to several controlling factors, including the distribution of relevant light species in the background atmosphere, the plane-parallel approximation, and the finite O energy distribution, are evaluated. |
| Keyword | planets and satellites: atmospheres planets and satellites: individual: Venus |
| Funding Organization | Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Key Research Program - Institute of Geology & Geophysics, CAS ; Key Research Program - Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Key Research Program - Institute of Geology & Geophysics, CAS ; Key Research Program - Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Key Research Program - Institute of Geology & Geophysics, CAS ; Key Research Program - Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Key Research Program - Institute of Geology & Geophysics, CAS ; Key Research Program - Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies |
| DOI | 10.1093/mnras/staa3744 |
| WOS Keyword | UPPER-ATMOSPHERE ; SOLAR-WIND ; MARS ; IONOSPHERE ; THERMOSPHERE ; RATES ; DISTRIBUTIONS ; ENERGIZATION ; EXOSPHERE ; PLASMA |
| Language | 英语 |
| Funding Project | Chinese Academy of Sciences (CAS)[XDB41000000] ; Key Research Program - Institute of Geology & Geophysics, CAS[IGGCAS-201904] ; National Natural Science Foundation of China[41525015] ; National Natural Science Foundation of China[41774186] ; National Natural Science Foundation of China[42020301] ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies[D020105] |
| Funding Organization | Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Key Research Program - Institute of Geology & Geophysics, CAS ; Key Research Program - Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Key Research Program - Institute of Geology & Geophysics, CAS ; Key Research Program - Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Key Research Program - Institute of Geology & Geophysics, CAS ; Key Research Program - Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; Chinese Academy of Sciences (CAS) ; Chinese Academy of Sciences (CAS) ; Key Research Program - Institute of Geology & Geophysics, CAS ; Key Research Program - Institute of Geology & Geophysics, CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies ; China's National Space Administration through the Preresearch Project on Civil Aerospace Technologies |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000608475600057 |
| Publisher | OXFORD UNIV PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/79757 |
| Collection | 中国科学院国家天文台 |
| Corresponding Author | Cui, Jun |
| Affiliation | 1.Sun Yat Sen Univ, Sch Atmospher Sci, Planetary Environm & Astrobiol Res Lab PEARL, Zhuhai 519082, Guangdong, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Lunar & Deep Space Explorat, Beijing 100101, Peoples R China 3.Chinese Acad Sci, Ctr Excellence Comparat Planetol, Hefei 230026, Anhui, Peoples R China 4.Harbin Inst Technol, Inst Space Sci & Appl Technol, Shenzhen 518055, Guangdong, Peoples R China |
| Recommended Citation GB/T 7714 | Gu, Hao,Cui, Jun,Niu, Dandan,et al. Hydrogen and helium escape on Venus via energy transfer from hot oxygen atoms[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,501(2):2394-2402. |
| APA | Gu, Hao,Cui, Jun,Niu, Dandan,&Yu, Jiang.(2021).Hydrogen and helium escape on Venus via energy transfer from hot oxygen atoms.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,501(2),2394-2402. |
| MLA | Gu, Hao,et al."Hydrogen and helium escape on Venus via energy transfer from hot oxygen atoms".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 501.2(2021):2394-2402. |
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