| 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 Publication | ASTROPHYSICAL JOURNAL LETTERS
 |
| 2016 | |
| Volume | 824Issue:1Pages:L2 |
| ISSN | 2041-8205 |
| Language | 英语 |
| Keyword | Magnetic Fields Magnetohydrodynamics (Mhd) Plasmas Solar Wind Turbulence Waves |
| Abstract | The 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 By | SCI |
| Document Type | 期刊论文 |
| Identifier | http://ir.nssc.ac.cn/handle/122/5683 |
| Collection | 空间科学部 |
| Corresponding Author | Li, 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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| 20168241L2.pdf（593KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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