气候变化领域集成服务门户(CCPortal): Momentum and Pressure Balance of a Comet Ionosphere

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DOI	10.1029/2020GL088666
	Momentum and Pressure Balance of a Comet Ionosphere
	Williamson H.N.; Nilsson H.; Stenberg Wieser G.; Eriksson A.I.; Richter I.; Goetz C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	We calculate the momentum flux and pressure of ions measured by the Ion Composition Analyzer (ICA) on the Rosetta mission at comet 67P/Churyumov-Gerasimenko. The total momentum flux stays roughly constant over the mission, but the contributions of different ion populations change depending on heliocentric distance. The magnetic pressure, calculated from Rosetta magnetometer measurements, roughly corresponds with the cometary ion momentum flux. When the spacecraft enters the solar wind ion cavity, the solar wind fluxes drop drastically, while the cometary momentum flux becomes roughly 10 times the solar wind fluxes outside of the ion cavity, indicating that pickup ions behave similarly to the solar wind ions in this region. We use electron density from the Langmuir probe to calculate the electron pressure, which is particularly important close to the comet nucleus where flow changes from antisunward to radially outward. ©2020. The Authors.
英文关键词	Ionosphere; Ions; Solar wind; Electron pressures; Heliocentric distances; Ion composition; Ion momentum fluxes; Magnetic pressure; Pressure balance; Rosetta mission; Solar-wind ions; Momentum; electron; electron density; ionosphere; magnetometer; momentum; pressure; solar wind; spacecraft
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169998
作者单位	Swedish Institute of Space Physics, Kiruna, Sweden; Swedish Institute of Space Physics, Uppsala, Sweden; Institut für Geophysik und extraterrestrische Physik, TU Braunschweig, Braunschweig, Germany; ESA/ESTEC, Noordwijk, Netherlands
推荐引用方式 GB/T 7714	Williamson H.N.,Nilsson H.,Stenberg Wieser G.,et al. Momentum and Pressure Balance of a Comet Ionosphere[J],2020,47(15).
APA	Williamson H.N.,Nilsson H.,Stenberg Wieser G.,Eriksson A.I.,Richter I.,&Goetz C..(2020).Momentum and Pressure Balance of a Comet Ionosphere.Geophysical Research Letters,47(15).
MLA	Williamson H.N.,et al."Momentum and Pressure Balance of a Comet Ionosphere".Geophysical Research Letters 47.15(2020).