CO-ANALYSIS OF SOLAR MICROWAVE AND HARD X-RAY SPECTRAL EVOLUTIONS. I. IN TWO FREQUENCY OR ENERGY RANGES
文献类型：期刊论文
| 作者 | Song, Qiwu1 ; Huang, Guangli1; Nakajima, Hiroshi2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2011-06-20 |
| 卷号 | 734期号:2页码:113(12pp) |
| 关键词 | Sun: flares Sun: radio radiation Sun: X-rays, gamma rays |
| ISSN号 | 0004-637X |
| 英文摘要 | Solar microwave and hard X-ray spectral evolutions are co-analyzed in the 2000 June 10 and 2002 April 10 flares, and are simultaneously observed by the Owens-Valley Solar Array in the microwave band and by Yohkoh/Hard X-ray Telescope or RHESSI in the hard X-ray band, with multiple subpeaks in their light curves. The microwave and hard X-ray spectra are fitted by a power law in two frequency ranges of the optical thin part and two photon energy ranges, respectively. Similar to an earlier event in Shao & Huang, the well-known soft-hard-soft pattern of the lower energy range changed to the hard-soft-hard (HSH) pattern of the higher energy range during the spectral evolution of each subpeak in both hard X-ray flares. This energy dependence is actually supported by a positive correlation between the overall light curves and spectral evolution in the lower energy range, while it becomes an anti-correlation in the higher energy range. Regarding microwave data, the HSH pattern appears in the spectral evolution of each subpeak in the lower frequency range, which is somewhat similar to Huang & Nakajima. However, it returns back to the well-known pattern of soft-hard-harder for the overall spectral evolution in the higher frequency range of both events. This frequency dependence is confirmed by an anti-correlation between the overall light curves and spectral evolution in the lower frequency range, but it becomes a positive correlation in the higher frequency range. The possible mechanisms are discussed, respectively, for reasons why hard X-ray and microwave spectral evolutions have different patterns in different energy and frequency intervals. |
| 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] | ELECTRON-SPECTRA ; FLARE MICROWAVE ; RADIO-EMISSION ; PARTICLE-ACCELERATION ; NONTHERMAL ELECTRONS ; PHOTOSPHERIC ALBEDO ; TEMPORAL EVOLUTION ; BURSTS ; DYNAMICS ; RHESSI |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000291386500041 |
| 公开日期 | 2012-08-07 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/4507]  |
| 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.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Nobeyama Solar Radio Observ, Minamisa Ku, Nagano 3841305, Japan |
| 推荐引用方式 GB/T 7714 | Song, Qiwu,Huang, Guangli,Nakajima, Hiroshi. CO-ANALYSIS OF SOLAR MICROWAVE AND HARD X-RAY SPECTRAL EVOLUTIONS. I. IN TWO FREQUENCY OR ENERGY RANGES[J]. ASTROPHYSICAL JOURNAL,2011,734(2):113(12pp). |
| APA | Song, Qiwu,Huang, Guangli,&Nakajima, Hiroshi.(2011).CO-ANALYSIS OF SOLAR MICROWAVE AND HARD X-RAY SPECTRAL EVOLUTIONS. I. IN TWO FREQUENCY OR ENERGY RANGES.ASTROPHYSICAL JOURNAL,734(2),113(12pp). |
| MLA | Song, Qiwu,et al."CO-ANALYSIS OF SOLAR MICROWAVE AND HARD X-RAY SPECTRAL EVOLUTIONS. I. IN TWO FREQUENCY OR ENERGY RANGES".ASTROPHYSICAL JOURNAL 734.2(2011):113(12pp). |
入库方式： OAI收割
来源：紫金山天文台
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