Lunar surface potential and electric field

doi:10.1088/1674-4527/19/6/77

	Lunar surface potential and electric field
	Li, Lei; Lhang, Yi-Teng; Zhou, Bin; Feng, Yong-Yong
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2019
卷号	19 期号:6 页码:77
关键词	Moon planets and satellites: surfaces planets and satellites: fundamental parameters planets and satellites: physical evolution
ISSN号	1674-4527
DOI	10.1088/1674-4527/19/6/77
英文摘要	The Moon has no significant atmosphere, thus its surface is exposed to solar ultraviolet radiation and the solar wind. Photoemission and collection of the solar wind electrons and ions may result in lunar surface charging. On the dayside, the surface potential is mainly determined by photoelectrons, modulated by the solar wind; while the nightside surface potential is a function of the plasma distribution in the lunar wake. Taking the plasma observations in the lunar environment as inputs, the global potential distribution is calculated according to the plasma sheath theory, assuming Maxwellian distributions for the surface emitted photoelectrons and the solar wind electrons. Results show that the lunar surface potential and sheath scale length change versus the solar zenith angle, which implies that the electric field has a horizontal component in addition to the vertical one. By differentiating the potential vertically and horizontally, we obtain the global electric field. It is found that the vertical electric field component is strongest at the subsolar point, which has a magnitude of 1 Vm(-1). The horizontal component is much weaker, and mainly appears near the terminator and on the nightside, with a magnitude of several mV m(-1). The horizontal electric field component on the nightside is rotationally symmetric around the wake axis and is strongly determined by the plasma parameters in the lunar wake.
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/7050]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Li, Lei,Lhang, Yi-Teng,Zhou, Bin,et al. Lunar surface potential and electric field[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2019,19(6):77.
APA	Li, Lei,Lhang, Yi-Teng,Zhou, Bin,&Feng, Yong-Yong.(2019).Lunar surface potential and electric field.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,19(6),77.
MLA	Li, Lei,et al."Lunar surface potential and electric field".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 19.6(2019):77.