DOI: 10.1002/2015GL064504
论文题名: Charge exchange in cometary coma: Discovery of H- ions in the solar wind close to comet 67P/Churyumov-Gerasimenko
作者: Burch J.L. ; Cravens T.E. ; Llera K. ; Goldstein R. ; Mokashi P. ; Tzou C.-Y. ; Broiles T.
刊名: Geophysical Research Letters
ISSN: 0094-9109
EISSN: 1944-8840
出版年: 2015
卷: 42, 期: 13 起始页码: 5125
结束页码: 5131
语种: 英语
英文关键词: charge exchange
; comet
; solar wind
Scopus关键词: Charge transfer
; Energy dissipation
; Ions
; Linguistics
; Semantics
; 67p/churyumov-gerasimenko
; Charge exchanges
; comet
; Electron sensors
; Energy deficit
; Proton energy
; Proton flux
; Space environment
; Solar wind
; angular momentum
; comet
; hydrogen
; ion exchange
; molecular analysis
; solar wind
英文摘要: As Rosetta was orbiting comet 67P/Churyumov-Gerasimenko, the Ion and Electron Sensor detected negative particles with angular distributions like those of the concurrently measured solar wind protons but with fluxes of only about 10% of the proton fluxes and energies of about 90% of the proton energies. Using well-known cross sections and energy-loss data, it is determined that the fluxes and energies of the negative particles are consistent with the production of H- ions in the solar wind by double charge exchange with molecules in the coma. Key Points Double charge exchange of protons produces negative H ions in the solar wind The measurements agree with published laboratory cross sections and energy deficits The cross sections and energy deficits are estimated for the first time in the space environment. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938079272&doi=10.1002%2f2015GL064504&partnerID=40&md5=8084d3ce428649c2bf571b990c091882
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8725
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: Southwest Research Institute, San Antonio, TX, United States
Recommended Citation:
Burch J.L.,Cravens T.E.,Llera K.,et al. Charge exchange in cometary coma: Discovery of H- ions in the solar wind close to comet 67P/Churyumov-Gerasimenko[J]. Geophysical Research Letters,2015-01-01,42(13).