Turbulent spectrum of Alfv,n waves excited by a kinetic instability for explaining the modulations with multi-timescales in solar flares
文献类型：期刊论文
| 作者 | Huang, Guangli |
| 刊名 | ASTROPHYSICS AND SPACE SCIENCE
 |
| 出版日期 | 2009-05-01 |
| 卷号 | 321期号:2页码:79-89 |
| 关键词 | The Sun: flares The Sun: waves |
| ISSN号 | 0004-640X |
| 英文摘要 | A low-frequency wave is treated as a local oscillation to modulate the guiding center of electrons beam, which is considered as free energy to excite Alfv,n waves by a kinetic plasma instability under low-frequency approximation. The nonlinearity of the model is shown by a critical value of the amplitude of the low-frequency wave, and Alfv,n waves are growing in a broad turbulent spectrum with fractional harmonics, which strongly depend on the criterion. The instability is limited in the direction nearly perpendicular to the ambient magnetic field. The growth rates are very sensitive to the beam speed that perpendicular to the magnetic field, the propagational angle, and the magnetic field strength, but not sensitive to the beam speed parallel to the magnetic field. This model is used to explain the modulations with multiple timescales in the flare light curves at radio, hard X-ray and H-alpha bands. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | FAST MHD WAVES ; HARD X-RAYS ; H-ALPHA ; NUMERICAL SIMULATIONS ; MICROWAVE-BURSTS ; CORONAL PLASMA ; RADIO-EMISSION ; DIRECT AMPLIFICATION ; PULSATIONS ; CATALOG |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000265440200001 |
| 公开日期 | 2011-12-08 |
| 源URL | [http://159.226.72.40/handle/332002/1547]  |
| 专题 | 紫金山天文台_太阳活动的多波段观测研究团组 |
| 作者单位 | Purple Mt Observ, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Guangli. Turbulent spectrum of Alfv,n waves excited by a kinetic instability for explaining the modulations with multi-timescales in solar flares[J]. ASTROPHYSICS AND SPACE SCIENCE,2009,321(2):79-89. |
| APA | Huang, Guangli.(2009).Turbulent spectrum of Alfv,n waves excited by a kinetic instability for explaining the modulations with multi-timescales in solar flares.ASTROPHYSICS AND SPACE SCIENCE,321(2),79-89. |
| MLA | Huang, Guangli."Turbulent spectrum of Alfv,n waves excited by a kinetic instability for explaining the modulations with multi-timescales in solar flares".ASTROPHYSICS AND SPACE SCIENCE 321.2(2009):79-89. |
入库方式： OAI收割
来源：紫金山天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。