Observational Study of a Peculiar Solar Limb Event Occurred on 11 January 2002
文献类型：期刊论文
| 作者 | Li, Hui ; You, Jianqi
|
| 刊名 | SOLAR PHYSICS
 |
| 出版日期 | 2009-08-01 |
| 卷号 | 258期号:1页码:89-104 |
| 关键词 | CORONAL MASS EJECTIONS MULTIWAVELENGTH OBSERVATIONS FLARE PROMINENCES DYNAMICS SPECTRA SURGES SPRAYS FLUX LINE |
| ISSN号 | 0038-0938 |
| 英文摘要 | On 11 January 2002, using the Multi-channel Infrared Solar Spectrograph (MISS) at the Purple Mountain Observatory (PMO), we obtained H alpha, Ca ii 8542 and He i 10 830 spectra and slit-jaw H alpha images of a peculiar solar limb event. A close resemblance of its intensity to that of a small flare and the GOES X-ray flux indicates that it was an active prominence. However, its morphological evolution and velocity variation were different from general typical active prominences, such as limb flares, post-flare loops, surges and sprays. It started with the ejection of material from the flare site. In the early phase, the ejecta was as bright as a limb flare and kept rising until reaching the height of (8 --aEuro parts per thousand 10)x10(4) km at an almost constant velocity of 91.7 km s (-1) with its lower part always connected to the solar surface. EUV images in 195 show similar structure as in the H alpha line, indicating the coexistence of plasmas with temperatures differing by more than two orders of magnitude. Later some material started to fall back to another bright area on the solar surface. The falling material did not show the collimated structure of surges or the arc structure of flaring arches. A red-shift velocity of more than 200 km s (-1) was detected in a bright point close to the outer edge of the closed loop system formed later, which dispersed in a few minutes and became a part of the newly formed large loop. The ejected material did not leave the sun, indicating that the magnetic reconnection was not sufficient to remove the overlying field lines during the process. The spectral line profiles showed large widths and variable velocities, and therefore the line-pair method is not applicable to this event for the estimation of physical parameters. |
| 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] | CORONAL MASS EJECTIONS ; MULTIWAVELENGTH OBSERVATIONS ; FLARE ; PROMINENCES ; DYNAMICS ; SPECTRA ; SURGES ; SPRAYS ; FLUX ; LINE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000268193000006 |
| 公开日期 | 2011-12-08 |
| 源URL | [http://159.226.72.40/handle/332002/1501]  |
| 专题 | 紫金山天文台_太阳高能及相关物理过程研究团组 |
| 作者单位 | Purple Mt Observ, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Hui,You, Jianqi. Observational Study of a Peculiar Solar Limb Event Occurred on 11 January 2002[J]. SOLAR PHYSICS,2009,258(1):89-104. |
| APA | Li, Hui,&You, Jianqi.(2009).Observational Study of a Peculiar Solar Limb Event Occurred on 11 January 2002.SOLAR PHYSICS,258(1),89-104. |
| MLA | Li, Hui,et al."Observational Study of a Peculiar Solar Limb Event Occurred on 11 January 2002".SOLAR PHYSICS 258.1(2009):89-104. |
入库方式： OAI收割
来源：紫金山天文台
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