气候变化领域集成服务门户(CCPortal): Singing Comet Waves in a Solar Wind Convective Electric Field Frame

CCPortal

DOI	10.1029/2020GL087418
	Singing Comet Waves in a Solar Wind Convective Electric Field Frame
	Goetz C.; Plaschke F.; Taylor M.G.G.T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:8
英文摘要	The cometary plasma environment at low gas production rates is dominated by highly compressional, large-amplitude magnetic field waves in the 10–100 mHz range. They are thought to be caused by an ion-Weibel instability due to a cross-field current, which is caused by the cometary ions that are accelerated along the solar wind convective electric field. We devise a new method to determine the location of the wave source, the wave power, frequency, and bandwidth. It is found that the wave occurs everywhere in the coma, regardless of electric field direction. There is no correlation between the wave frequency and the measured plasma density. This is not in agreement with previous studies. A dependence of the frequency on the position of the spacecraft in a comet-fixed frame is in agreement with the prediction from the ion-Weibel instability. We infer a wave generation region much larger than the cometocentric distances covered by Rosetta. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Ions; Plasma density; Solar wind; Wave power; Electric-field directions; Field currents; Gas productions; Large amplitude; Plasma environments; Wave frequencies; Wave generation; Weibel instability; Electric fields; amplitude; compression; correlation; electric field; electromagnetic wave; gas production; magnetic field; solar wind; spacecraft; wave generation
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/170437
作者单位	ESTEC, European Space Agency, Noordwijk, Netherlands; Space Research Institute, Austrian Academy of Sciences, Graz, Austria
推荐引用方式 GB/T 7714	Goetz C.,Plaschke F.,Taylor M.G.G.T.. Singing Comet Waves in a Solar Wind Convective Electric Field Frame[J],2020,47(8).
APA	Goetz C.,Plaschke F.,&Taylor M.G.G.T..(2020).Singing Comet Waves in a Solar Wind Convective Electric Field Frame.Geophysical Research Letters,47(8).
MLA	Goetz C.,et al."Singing Comet Waves in a Solar Wind Convective Electric Field Frame".Geophysical Research Letters 47.8(2020).