A quasi-periodic solar radio fluctuation at microwave band
文献类型：期刊论文
| 作者 | Xu, FY; Huang, GL; Wu, HA |
| 刊名 | CHINESE PHYSICS LETTERS
 |
| 出版日期 | 2005-12-01 |
| 卷号 | 22期号:12页码:3229-3232 |
| 关键词 | LOW CORONA FLARE DRIFT |
| ISSN号 | 0256-307X |
| 英文摘要 | A rare but interesting solar radio fine structure, quasi-periodic fluctuations, on 25 August 1999 was observed at microwave band for the first time. They fluctuated initially at a nearly stable frequency level then at a reverse drift component up to 5.49 GHz. The individual fluctuation consists of a bi-directional drift component. The features are characterized by narrow bandwidth of Delta f/f <= 3%, quasi-periodicity of similar to 100 ms as well as a slowly reverse and a rapidly normal drift rates on the bi-directional drift component. The associated data of the Yohkoh soft and hard x-ray telescope and Nobeyama radio heliograph at 17GHz showed that there are several bright spots (i.e. inhomogeneities) along the soft x-ray loop, and the locations of both radio and soft x-ray sources are closely consistent. Therefore, the fluctuations are most likely caused by the inhomogeneities within a Bare loop. Based on the two-component atmospheric model, we suggest a three-component atmospheric model with large scale length lambda and small scale lengths lambda(1) and lambda(2) to describe equilibrium atmosphere and inhomogeneity, With the beam model, the characters of fluctuations may be interpreted reasonably by the quasi-equidistant inhomogeneity along a Rare loop. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | LOW CORONA ; FLARE ; DRIFT |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000233799600069 |
| 公开日期 | 2012-03-07 |
| 源URL | [http://159.226.72.40/handle/332002/4136]  |
| 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 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, FY,Huang, GL,Wu, HA. A quasi-periodic solar radio fluctuation at microwave band[J]. CHINESE PHYSICS LETTERS,2005,22(12):3229-3232. |
| APA | Xu, FY,Huang, GL,&Wu, HA.(2005).A quasi-periodic solar radio fluctuation at microwave band.CHINESE PHYSICS LETTERS,22(12),3229-3232. |
| MLA | Xu, FY,et al."A quasi-periodic solar radio fluctuation at microwave band".CHINESE PHYSICS LETTERS 22.12(2005):3229-3232. |
入库方式： OAI收割
来源：紫金山天文台
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