| Spectral analysis and atmospheric models of microflares | |
Fang, C1; Tang, YH1; Xu Z(徐稚)1,2 ; Fang, C (reprint author), Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China.
| |
| 发表期刊 | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS
 |
| 2006 | |
| 卷号 | 6期号:5页码:597-607 |
| DOI | 10.1088/1009-9271/6/5/12 |
| 产权排序 | 第2完成单位 |
| 收录类别 | SCI |
| 关键词 | Sun : Microflares Sun : Spectrum Sun : Semi-empirical Modelling |
| 摘要 | By use of the high-resolution spectral data obtained with THEMIS on 2002 September 5, the spectra and characteristics of five well-observed microflares have been analyzed. Our results indicate that some of them are located near the longitudinal magnetic polarity inversion lines. All the microflares are accompanied by mass motions. The most obvious characteristic of the H alpha microflare spectra is the emission at the center of both H alpha and Call 8542 angstrom lines. For the first time both thermal and non-thermal semi-empirical atmospheric models for the conspicuous and faint microflares are computed. In computing the non-thermal models, we assume that the electron beam resulting from magnetic reconnection is produced in the chromosphere, because it requires lower energies for the injected particles. It is found there is obvious heating in the low chromosphere. The temperature enhancement is about 1000-2200 K in the thermal models. If the non-thermal effects are included, then the required temperature increase can be reduced by 100-150 K. These imply that the H alpha microflares can probably be produced by magnetic reconnection in the solar lower atmosphere. The radiative and kinetic energies of the Ha microflares are estimated and the total energy is found to be 10(27) - 4 x 10(28) erg. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 1009-9271 |
| URL | 查看原文 |
| WOS记录号 | WOS:000241487800012 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | HARD X-RAY ; REGION TRANSIENT BRIGHTENINGS ; SOLAR ACTIVE-REGION ; H-ALPHA ; CHROMOSPHERIC FLARES ; ELLERMAN BOMBS ; QUIET SUN ; HYDROGEN ; POINTS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/6097 |
| 专题 | 太阳物理研究组 |
| 通讯作者 | Fang, C (reprint author), Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China. |
| 作者单位 | 1.Department of Astronomy, Nanjing University, Nanjing 210093 2.National Astronomical Observatories / Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 |
| 推荐引用方式 GB/T 7714 | Fang, C,Tang, YH,Xu Z,et al. Spectral analysis and atmospheric models of microflares[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2006,6(5):597-607. |
| APA | Fang, C,Tang, YH,Xu Z,&Fang, C .(2006).Spectral analysis and atmospheric models of microflares.CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,6(5),597-607. |
| MLA | Fang, C,et al."Spectral analysis and atmospheric models of microflares".CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 6.5(2006):597-607. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Spectral Analysis an（334KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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。
修改评论