PMO OpenIR
Spatial Distribution of Electromagnetic Waves near the Proton Cyclotron Frequency in ICME Sheath Regions Associated with Quasi-perpendicular Shocks: Wind Observations
Li, Q. H.1,2; Yang, L.1,3; Xiang, L.4; Wu, D. J.1
2020-04-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume892Issue:2Pages:15
Corresponding AuthorLi, Q. H.(ylei@pmo.ac.cn)
AbstractElectromagnetic waves (EMWs) near the proton cyclotron frequency f(cp) are transverse left-handed (LH) or right-handed (RH) polarized waves, and are ubiquitous in the solar wind. However, the characteristics of these waves in the sheath regions of interplanetary coronal mass ejections (ICMEs) are poorly understood. Through a comprehensive survey of Wind magnetic field and plasma data using dynamic spectra and repeated filtering analyses, 700 EMW events (7.1% of the analysis time) are identified in the 62 ICME sheath regions associated with quasi-perpendicular shocks involved with a low shock Mach number M-f and low upstream beta(1). In the ICME sheath regions, outward (inward)-propagating LH (RH) EMWs have relatively higher counts and longer duration than inward (outward)-propagating LH (RH) EMWs in the plasma frame, consistent with previous STEREO observations. The spatial distributions of the magnetic field, plasma, and frequency parameters of EMWs are also presented in both spacecraft and plasma frames, especially the proton (alpha) temperature anisotropy alpha abundance N-alpha/N-p, and normalized differential alpha-proton speed V-d/V-A. After removing the Doppler shift, 81.1% (59%) of all outward (inward)-propagating LH EMWs have a frequency below (above) 0.5f(cp), while 68.3% (64%) of all outward (inward)-propagating RH EMWs have a frequency smaller (greater) than 0.5f(cp). Further investigations of local plasma parameters reveal that different excitation mechanisms for EMWs are in different subregions of the ICME sheath regions. These results are helpful in understanding the important role of EMWs in the solar wind-ICME coupling process with different sheath regions.
KeywordInterplanetary magnetic fields Solar coronal mass ejection shocks Solar wind Space plasmas
DOI10.3847/1538-4357/ab7cde
WOS KeywordCORONAL MASS EJECTIONS ; SOLAR-WIND ; MAGNETIC-FIELD ; MAGNETOSPHERIC STORMS ; MIRROR WAVES ; DOWNSTREAM ; DRIVEN ; PLASMA ; ANISOTROPY ; PARALLEL
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000523448200001
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/35833
Collection中国科学院紫金山天文台
Corresponding AuthorLi, Q. H.
Affiliation1.Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210034, Peoples R China
2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
3.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China
4.Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China
Recommended Citation
GB/T 7714
Li, Q. H.,Yang, L.,Xiang, L.,et al. Spatial Distribution of Electromagnetic Waves near the Proton Cyclotron Frequency in ICME Sheath Regions Associated with Quasi-perpendicular Shocks: Wind Observations[J]. ASTROPHYSICAL JOURNAL,2020,892(2):15.
APA Li, Q. H.,Yang, L.,Xiang, L.,&Wu, D. J..(2020).Spatial Distribution of Electromagnetic Waves near the Proton Cyclotron Frequency in ICME Sheath Regions Associated with Quasi-perpendicular Shocks: Wind Observations.ASTROPHYSICAL JOURNAL,892(2),15.
MLA Li, Q. H.,et al."Spatial Distribution of Electromagnetic Waves near the Proton Cyclotron Frequency in ICME Sheath Regions Associated with Quasi-perpendicular Shocks: Wind Observations".ASTROPHYSICAL JOURNAL 892.2(2020):15.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, Q. H.]'s Articles
[Yang, L.]'s Articles
[Xiang, L.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, Q. H.]'s Articles
[Yang, L.]'s Articles
[Xiang, L.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, Q. H.]'s Articles
[Yang, L.]'s Articles
[Xiang, L.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.