Identification of mirror waves by the phase difference between perturbed magnetic field and plasmas

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳和太阳系等离子体研究团组

	Identification of mirror waves by the phase difference between perturbed magnetic field and plasmas
	Lin, CH ; Chao, JK ; Lee, LC ; Wu, DJ; Li, Y ; Wu, BH ; Song, P
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	1998-04-01
卷号	103 期号:A4 页码:6621-6631
关键词	LOW-FREQUENCY FLUCTUATIONS QUASI-PERPENDICULAR SHOCK EARTHS MAGNETOSHEATH INNER MAGNETOSHEATH INSTABILITIES MAGNETOPAUSE DOWNSTREAM
英文摘要	A new approach is proposed to identify mirror waves based on the 90 degrees phase difference between the magnetic field and plasma fluctuations. Magnetosheath observations, the linear MHD theory, and one-dimensional hybrid simulations support that the 90 degrees phase difference is a special character for mirror waves. This phase difference is independent of Doppler shift which means that our result remains the same in both the satellite (laboratory) and the plasma frames of reference. Therefore it is useful to distinguish mirror waves from slow waves which also have an anticorrelation (i.e., 180 degrees out of phase) relationship between magnetic field strength and plasma density fluctuations. The time evolution in the later stage shows that the dominant perturbed components are the magnetic field fluctuation along the background magnetic field B-0 and the velocity fluctuation perpendicular to B-0 and the wave vector k. A higher coherence and a stable 90 degrees phase difference between these two dominant components are found as time increases. The coherence between this velocity component and the plasma density is also high with a 90 degrees phase difference. A tendency is found that the longer wavelengths are progressively generated when mirror waves grow in simulation.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LOW-FREQUENCY FLUCTUATIONS ; QUASI-PERPENDICULAR SHOCK ; EARTHS MAGNETOSHEATH ; INNER MAGNETOSHEATH ; INSTABILITIES ; MAGNETOPAUSE ; DOWNSTREAM
收录类别	SCI
语种	英语
WOS记录号	WOS:000072951700013
公开日期	2013-02-05
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8344]
专题	紫金山天文台_太阳和太阳系等离子体研究团组
作者单位	1.Natl Cent Univ, Inst Space Sci, Chungli 32054, Taiwan 2.Natl Cheng Kung Univ, Dept Earth Sci, Tainan 701, Taiwan 3.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 4.Univ Sci & Technol China, Dept Earth & Space Sci, Hefei 230026, Peoples R China 5.Univ Michigan, Space Phys Res Lab, Ann Arbor, MI 48109 USA
推荐引用方式 GB/T 7714	Lin, CH,Chao, JK,Lee, LC,et al. Identification of mirror waves by the phase difference between perturbed magnetic field and plasmas[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,1998,103(A4):6621-6631.
APA	Lin, CH.,Chao, JK.,Lee, LC.,Wu, DJ.,Li, Y.,...&Song, P.(1998).Identification of mirror waves by the phase difference between perturbed magnetic field and plasmas.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,103(A4),6621-6631.
MLA	Lin, CH,et al."Identification of mirror waves by the phase difference between perturbed magnetic field and plasmas".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 103.A4(1998):6621-6631.