Bi-directional flows in a C-class solar flare
文献类型：期刊论文
| 作者 | Ning, Zongjun1,2
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| 刊名 | ASTROPHYSICS AND SPACE SCIENCE
 |
| 出版日期 | 2016 |
| 卷号 | 361期号:1 |
| 关键词 | Sun Flares and Sun UV radiation and Sun X-ray bursts Hard |
| 英文摘要 | We have explored the bi-directional flows in a C-class solar flare observed by Solar Dynamic Observatory Atmospheric Imaging Assembly (SDO/AIA) on 2012 December 26. This event occurs in a curved magnetic loop connecting a pair of negative and positive fields. The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) observations show a X-ray source in 3-25 keV stayed at the loop top during the flare. High-cadence AIA observations exhibit many flows movement intermittently along the flare loop. In order to analyze these flows, firstly, the event is cut along the loop direction with a curved slit which is wide enough to include the bulk of ultraviolet (UV) and X-ray emissions. Secondly, after integration the flux along the slit width, we get the space-time slices at 9 AIA wavelengths and in RHESSI 3-25 keV. Thirdly, the derivative is done on the space-time slices. Many bi-directional flows are identified as the oblique streaks on the intensity-gradient space-time slices during the flare lifetime. They almost start from the same position near the loop top, where the X-ray emission is bright in 3-25 keV. Then they move toward the positive and the negative polarity footpoints simultaneously. Their average speed is directly measured about 230 km s(-1), and they exhibit a typical quasi-period of about 3 minutes. The characteristics of these flows, such as bi-directional, simultaneous, symmetrical and quasi-periodic, are the observational constraints for acceleration theories. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | 2003 NOVEMBER 3 ; X-RAY SOURCES ; MAGNETIC RECONNECTION ; PARTICLE-ACCELERATION ; ELECTRON-BEAMS ; CORONAL HARD ; RHESSI ; LOOP ; RADIO ; PHASE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000367516500022 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/16100]  |
| 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.Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China 2.Nanjing Univ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ning, Zongjun. Bi-directional flows in a C-class solar flare[J]. ASTROPHYSICS AND SPACE SCIENCE,2016,361(1). |
| APA | Ning, Zongjun.(2016).Bi-directional flows in a C-class solar flare.ASTROPHYSICS AND SPACE SCIENCE,361(1). |
| MLA | Ning, Zongjun."Bi-directional flows in a C-class solar flare".ASTROPHYSICS AND SPACE SCIENCE 361.1(2016). |
入库方式： OAI收割
来源：紫金山天文台
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