Interaction between an emerging flux region and a pre-existing fan-spine dome observed by IRIS and SDO
文献类型：期刊论文
| 作者 | Jiang, Fayu ; Zhang, Jun; Yang, Shuhong
|
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2015-08-01 |
| 卷号 | 67期号:4 |
| 关键词 | magnetic reconnection Sun: activity Sun: chromosphere Sun: corona Sun: transition region |
| 英文摘要 | We present multiwavelength observations of a fan-spine dome in the active region NOAA 11996 with the Interface Region Imaging Spectrograph (IRIS) and the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory (SDO) on 2014 March 9. The destruction of the fan-spine topology owing to the interaction between its magnetic fields and a nearby emerging flux region (EFR) is observed for the first time. The line-of-sight magnetograms from the Helioseismic and Magnetic Imager on board the SDO reveal that the dome is located on the mixed magnetic fields, with its rim rooted in the redundant positive polarity surrounding the minority parasitic negative fields. The fan surface of the dome consists of a filament system and recurring jets are observed along its spine. The jet occurring around 13: 54 UT is accompanied by a quasi-circular ribbon that brightens in the clockwise direction along the bottom rim of the dome, which may indicate an occurrence of slipping reconnection in the fan-spine topology. The EFR emerges continuously and meets with the magnetic fields of the dome. Magnetic cancellations take place between the emerging negative polarity and the outer positive polarity of the dome's fields, which lead to the rise of the loop connecting the EFR and brightenings related to the dome. A single Gaussian fit to the profiles of the IRIS Si IV 1394 angstrom line is used in the analysis. It appears that there are two rising components along the slit, in addition to the rise in the line-of-sight direction. The cancellation process repeats again and again. Eventually the fan-spine dome is destroyed and a new connectivity is formed. We suggest that magnetic reconnection between the EFR and the magnetic fields of the fan-spine dome is responsible for the destruction of the dome. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000359649800022 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5629]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Fayu,Zhang, Jun,Yang, Shuhong. Interaction between an emerging flux region and a pre-existing fan-spine dome observed by IRIS and SDO[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2015,67(4). |
| APA | Jiang, Fayu,Zhang, Jun,&Yang, Shuhong.(2015).Interaction between an emerging flux region and a pre-existing fan-spine dome observed by IRIS and SDO.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,67(4). |
| MLA | Jiang, Fayu,et al."Interaction between an emerging flux region and a pre-existing fan-spine dome observed by IRIS and SDO".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 67.4(2015). |
入库方式： OAI收割
来源：国家天文台
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