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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
1998-04-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
Volume103Issue:A4Pages:6621-6631
AbstractA 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.
KeywordLow-frequency Fluctuations Quasi-perpendicular Shock Earths Magnetosheath Inner Magnetosheath Instabilities Magnetopause Downstream
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
WOS KeywordLOW-FREQUENCY FLUCTUATIONS ; QUASI-PERPENDICULAR SHOCK ; EARTHS MAGNETOSHEATH ; INNER MAGNETOSHEATH ; INSTABILITIES ; MAGNETOPAUSE ; DOWNSTREAM
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000072951700013
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8344
Collection太阳和太阳系等离子体研究团组
Affiliation1.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
Recommended Citation
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.
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