| SUNWARD-PROPAGATING ALFVÉNIC FLUCTUATIONS OBSERVED IN THE HELIOSPHERE | |
| Hui Li; Chi Wang; John W. Belcher; Jiansen He; John D. Richardson | |
| Department | 空间科学部 |
| Source Publication | Astrophysical Journal Letters
 |
| 2016 | |
| Volume | 824Issue:1 |
| ISSN | 2041-8205 |
| Language | 英语 |
| Abstract | The mixture/interaction of anti-sunward-propagating Alfvénic fluctuations (AFs) and sunward-propagating Alfvénic fluctuations (SAFs) is believed to result in the decrease of the Alfvénicity 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/122/5448 |
| Collection | 空间科学部 |
| Recommended Citation GB/T 7714 | Hui Li,Chi Wang,John W. Belcher,et al. SUNWARD-PROPAGATING ALFVÉNIC FLUCTUATIONS OBSERVED IN THE HELIOSPHERE[J]. Astrophysical Journal Letters,2016,824(1). |
| APA | Hui Li,Chi Wang,John W. Belcher,Jiansen He,&John D. Richardson.(2016).SUNWARD-PROPAGATING ALFVÉNIC FLUCTUATIONS OBSERVED IN THE HELIOSPHERE.Astrophysical Journal Letters,824(1). |
| MLA | Hui Li,et al."SUNWARD-PROPAGATING ALFVÉNIC FLUCTUATIONS OBSERVED IN THE HELIOSPHERE".Astrophysical Journal Letters 824.1(2016). |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| 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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