Cluster-C1 observations on the geometrical structure of linear magnetic   holes in the solar wind at 1 AU

doi:10.5194/angeo-28-1695-2010

CORC > 北京大学 > 地球与空间科学学院

	Cluster-C1 observations on the geometrical structure of linear magnetic holes in the solar wind at 1 AU
	Xiao, T. ; Shi, Q. Q. ; Zhang, T. L. ; Fu, S. Y. ; Li, L. ; Zong, Q. G. ; Pu, Z. Y. ; Xie, L. ; Sun, W. J. ; Liu, Z. X. ; Lucek, E. ; Reme, H.
刊名	annales geophysicae
	2010
关键词	Interplanetary physics Interplanetary magnetic fields Plasma waves and turbulence General or miscellaneous NONLINEAR ALFVEN WAVES MIRROR-MODE STRUCTURES INTERPLANETARY SPACE ULYSSES OBSERVATIONS FIELD MEASUREMENTS LION ROARS EQUATOR-S MAGNETOSHEATH DISCONTINUITIES MAGNETOSPHERE
DOI	10.5194/angeo-28-1695-2010
英文摘要	Interplanetary linear magnetic holes (LMHs) are structures in which the magnetic field magnitude decreases with little change in the field direction. They are a 10-30% subset of all interplanetary magnetic holes (MHs). Using magnetic field and plasma measurements obtained by Cluster-C1, we surveyed the LMHs in the solar wind at 1 AU. In total 567 interplanetary LMHs are identified from the magnetic field data when Cluster-C1 was in the solar wind from 2001 to 2004. We studied the relationship between the durations and the magnetic field orientations, as well as that of the scales and the field orientations of LMHs in the solar wind. It is found that the geometrical structure of the LMHs in the solar wind at 1 AU is consistent with rotational ellipsoid and the ratio of scales along and across the magnetic field is about 1.93:1. In other words, the structure is elongated along the magnetic field at 1 AU. The occurrence rate of LMHs in the solar wind at 1 AU is about 3.7 per day. It is shown that not only the occurrence rate but also the geometrical shape of interplanetary LMHs has no significant change from 0.72 AU to 1 AU in comparison with previous studies. It is thus inferred that most of interplanetary LMHs observed at 1 AU are formed and fully developed before 0.72 AU. The present results help us to study the formation mechanism of the LMHs in the solar wind.; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences; SCI(E); 6; ARTICLE; 9; 1695-1702; 28
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/396342]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Xiao, T.,Shi, Q. Q.,Zhang, T. L.,et al. Cluster-C1 observations on the geometrical structure of linear magnetic holes in the solar wind at 1 AU[J]. annales geophysicae,2010.
APA	Xiao, T..,Shi, Q. Q..,Zhang, T. L..,Fu, S. Y..,Li, L..,...&Reme, H..(2010).Cluster-C1 observations on the geometrical structure of linear magnetic holes in the solar wind at 1 AU.annales geophysicae.
MLA	Xiao, T.,et al."Cluster-C1 observations on the geometrical structure of linear magnetic holes in the solar wind at 1 AU".annales geophysicae (2010).