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SUNWARD-PROPAGATING ALFVENIC FLUCTUATIONS OBSERVED IN THE HELIOSPHERE
Li, Hui; Wang, Chi; Belcher, John W.; He, Jiansen; Richardson, John D.; Li, H (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2016
Volume824Issue:1Pages:L2
ISSN2041-8205
Language英语
KeywordMagnetic Fields Magnetohydrodynamics (Mhd) Plasmas Solar Wind Turbulence Waves
AbstractThe mixture/interaction of anti-sunward-propagating Alfvenic fluctuations (AFs) and sunward-propagating Alfvenic fluctuations (SAFs) is believed to result in the decrease of the Alfvenicity of solar wind fluctuations with increasing heliocentric distance. However, SAFs are rarely observed at 1 au and solar wind AFs are found to be generally outward. Using the measurements from Voyager 2 and Wind, we perform a statistical survey of SAFs in the heliosphere inside 6 au. We first report two SAF events observed by Voyager 2. One is in the anti-sunward magnetic sector with a strong positive correlation between the fluctuations of magnetic field and solar wind velocity. The other one is in the sunward magnetic sector with a strong negative magnetic field-velocity correlation. Statistically, the percentage of SAFs increases gradually with heliocentric distance, from about 2.7% at 1.0 au to about 8.7% at 5.5 au. These results provide new clues for understanding the generation mechanism of SAFs.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/5683
Collection空间科学部
Corresponding AuthorLi, H (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Li, Hui,Wang, Chi,Belcher, John W.,et al. SUNWARD-PROPAGATING ALFVENIC FLUCTUATIONS OBSERVED IN THE HELIOSPHERE[J]. ASTROPHYSICAL JOURNAL LETTERS,2016,824(1):L2.
APA Li, Hui,Wang, Chi,Belcher, John W.,He, Jiansen,Richardson, John D.,&Li, H .(2016).SUNWARD-PROPAGATING ALFVENIC FLUCTUATIONS OBSERVED IN THE HELIOSPHERE.ASTROPHYSICAL JOURNAL LETTERS,824(1),L2.
MLA Li, Hui,et al."SUNWARD-PROPAGATING ALFVENIC FLUCTUATIONS OBSERVED IN THE HELIOSPHERE".ASTROPHYSICAL JOURNAL LETTERS 824.1(2016):L2.
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