globalchange  > 科学计划与规划
DOI: 10.1002/2016GL070326
论文题名:
The vertical thickness of Jupiter's Europa gas torus from charged particle measurements
作者: Kollmann P.; Paranicas C.; Clark G.; Roussos E.; Lagg A.; Krupp N.
刊名: Geophysical Research Letters
ISSN: 0094-8619
EISSN: 1944-8350
出版年: 2016
卷: 43, 期:18
起始页码: 9425
结束页码: 9433
语种: 英语
英文关键词: charge exchange ; EPD ; Europa torus ; Galileo ; Jupiter ; pitch angle
Scopus关键词: Charge transfer ; Orbits ; Charge exchanges ; Europa torus ; GALILEO ; Jupiters ; Pitch angle ; Charged particles
英文摘要: Measurements and modeling suggest the presence of a neutral gas torus collocated with the orbit of Jupiter's moon Europa. Here we use data from the CMS instrument that is part of the Energetic Particles Detector (EPD) on board the Galileo spacecraft to characterize the distribution of 130 keV protons. Near the orbit of Europa this distribution has a minimum around 70° in equatorial pitch angle. We reproduce this with a model assuming that the protons are lost via charge exchange with a gas torus. Since the pitch angle characterizes whether the protons remain mostly in the dense center of the torus or continuously bounce through it, we can determine the latitudinal extent of the torus. We find that the full thickness where its density falls to 1/e of its maximum has to be (Formula presented.) and is closer to ≈1RJ. ©2016. The Authors.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84992386942&doi=10.1002%2f2016GL070326&partnerID=40&md5=015a7c3cef700db0ffc0cb6ce704e542
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9582
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: Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, United States

Recommended Citation:
Kollmann P.,Paranicas C.,Clark G.,et al. The vertical thickness of Jupiter's Europa gas torus from charged particle measurements[J]. Geophysical Research Letters,2016-01-01,43(18).
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