DOI: 10.1002/2016GL070612
论文题名: On the origin of the ionosphere at the Moon using results from Chandrayaan-1 S band radio occultation experiment and a photochemical model
作者: Choudhary R.K. ; Ambili K.M. ; Choudhury S. ; Dhanya M.B. ; Bhardwaj A.
刊名: Geophysical Research Letters
ISSN: 0094-8574
EISSN: 1944-8305
出版年: 2016
卷: 43, 期: 19 起始页码: 10025
结束页码: 10033
语种: 英语
英文关键词: ionospheric modeling
; lunar ionosphere
; radio occultation
Scopus关键词: Carbon dioxide
; Charge transfer
; Inert gases
; Ionization
; Ionization of gases
; Ionosphere
; Ionospheric measurement
; Ions
; Moon
; Radio
; Solar wind
; Charge exchanges
; Electron impact-ionization
; Ionospheric model
; Model calculations
; Near-surface density
; Origin of the Moon
; Photochemical modeling
; Radio occultations
; Impact ionization
英文摘要: The origin of the Moon's ionosphere has been explored using Chandrayaan-1 radio occultation (RO) measurements and a photochemical model. The electron density near the Moon's surface, obtained on 31 July 2009 (∼300 cm−3), is compared with results from a model which includes production and recombination of 16 ions, solar wind proton charge exchange, and the electron impact ionization. The model calculations suggest that in the absence of transport, inert ions, namely Ar+, Ne+, and He+, dominate lunar ionosphere (density ∼5 × 104 cm−3). Interaction with solar wind, however, leads to their complete removal (∼2–3 cm−3). Assuming the Moon's exosphere to have CO2, H2O, O, OH, H2, CH4, and CO molecules in addition to the inert gases, the model calculations suggest that the lunar ionosphere is dominated by molecular ions, namely H2O+, CO2 +, and H3O+, with near-surface density ∼250 cm−3. We surmise that lunar ionosphere can be molecular in nature. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84990842195&doi=10.1002%2f2016GL070612&partnerID=40&md5=2cef76da6d9c6cc9f804850511e4e518
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9537
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum, India
Recommended Citation:
Choudhary R.K.,Ambili K.M.,Choudhury S.,et al. On the origin of the ionosphere at the Moon using results from Chandrayaan-1 S band radio occultation experiment and a photochemical model[J]. Geophysical Research Letters,2016-01-01,43(19).