KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS IN THE SOLAR CORONA
文献类型：期刊论文
| 作者 | Ruan, Wenzhi; He, Jiansen; Zhang, Lei; Vocks, Christian; Marsch, Eckart; Tu, Chuanyi; Peter, Hardi; Wang, Linghua |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2016 |
| 卷号 | 825期号:1页码:58 |
| 关键词 | Sun: corona Sun: oscillations waves |
| ISSN号 | 0004-637X |
| 通讯作者 | He, JS (reprint author), Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China. ; He, JS (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China. |
| 英文摘要 | Quasi-periodic disturbances of emission-line parameters are frequently observed in the corona. These disturbances propagate upward along the magnetic field with speeds of similar to 100 km s(-1). This phenomenon has been interpreted as evidence of the propagation of slow magnetosonic waves or has been argued to be a signature of intermittent outflows superposed on the background plasmas. Here we aim to present a new "wave + flow" model to interpret these observations. In our scenario, the oscillatory motion is a slow-mode wave, and the flow is associated with a beam created by the wave-particle interaction owing to Landau resonance. With the help of a kinetic model, we simulate the propagation of slow-mode waves and the generation of beam flows. We find that weak periodic beam flows can be generated by to Landau resonance in the solar corona, and the phase with the strongest blueward asymmetry is ahead of that with the strongest blueshift by about 1/4 period. We also find that the slow wave damps to the level of 1/e after the transit time of two wave periods, owing to Landau damping and Coulomb collisions in our simulation. This damping timescale is similar to that resulting from thermal conduction in the MHD regime. The beam flow is weakened/attenuated with increasing wave period and decreasing wave amplitude since Coulomb collisions become more and more dominant over the wave action. We suggest that this "wave + flow" kinetic model provides an alternative explanation for the observed quasi-periodic propagating perturbations in various parameters in the solar corona. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/5674]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Ruan, Wenzhi,He, Jiansen,Zhang, Lei,et al. KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS IN THE SOLAR CORONA[J]. ASTROPHYSICAL JOURNAL,2016,825(1):58. |
| APA | Ruan, Wenzhi.,He, Jiansen.,Zhang, Lei.,Vocks, Christian.,Marsch, Eckart.,...&Wang, Linghua.(2016).KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS IN THE SOLAR CORONA.ASTROPHYSICAL JOURNAL,825(1),58. |
| MLA | Ruan, Wenzhi,et al."KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS IN THE SOLAR CORONA".ASTROPHYSICAL JOURNAL 825.1(2016):58. |
入库方式： OAI收割
来源：国家空间科学中心
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