Sunspot Light Walls Suppressed by Nearby Brightenings
文献类型：期刊论文
| 作者 | Yang, Shuhong1,2 ; Zhang, Jun1,2; Erdelyi, Robertus3,4; Hou, Yijun1,2; Li, Xiaohong1,2; Yan, Limei5; Zhang,Jun; Yang,Shuhong
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2017-07-01 |
| 卷号 | 843期号:1 |
| 关键词 | Sun: chromosphere Sun: photosphere Sun: UV radiation sunspots |
| 英文摘要 | Light walls, as ensembles of oscillating bright structures rooted in sunspot light bridges, have not been well studied, although they are important for understanding sunspot properties. Using the Interface Region Imaging Spectrograph and Solar Dynamics Observatory observations, here we study the evolution of two oscillating light walls each within its own active region (AR). The emission of each light wall decays greatly after the appearance of adjacent brightenings. For the first light wall, rooted within AR 12565, the average height, amplitude, and oscillation period significantly decrease from 3.5 Mm, 1.7 Mm, and 8.5 minutes to 1.6 Mm, 0.4 Mm, and 3.0 minutes, respectively. For the second light wall, rooted within AR 12597, the mean height, amplitude, and oscillation period of the light wall decrease from 2.1 Mm, 0.5 Mm, and 3.0 minutes to 1.5 Mm, 0.2 Mm, and 2.1 minutes, respectively. Particularly, a part of the second light wall even becomes invisible after the influence of a nearby brightening. These results reveal that the light walls are suppressed by nearby brightenings. Considering the complex magnetic topology in light bridges, we conjecture that the fading of light walls may be caused by a drop in the magnetic pressure, where the flux is canceled by magnetic reconnection at the site of the nearby brightening. Another hypothesis is that the wall fading is due to the suppression of driver source (p-mode oscillation), resulting from the nearby avalanche of downward particles along reconnected brightening loops. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DYNAMICS-OBSERVATORY SDO ; PLASMA EJECTIONS ; FLUX EMERGENCE ; BRIDGE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000404731200006 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8820]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, CAS Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Coll Astron & Space Sci, Beijing 100049, Peoples R China 3.Univ Sheffield, Sch Math & Stat, Solar Phys & Space Plasma Res Ctr, Hicks Bldg,Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England 4.Eotvos Lorand Univ, Dept Astron, POB 32, H-1518 Budapest, Hungary 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Shuhong,Zhang, Jun,Erdelyi, Robertus,et al. Sunspot Light Walls Suppressed by Nearby Brightenings[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,843(1). |
| APA | Yang, Shuhong.,Zhang, Jun.,Erdelyi, Robertus.,Hou, Yijun.,Li, Xiaohong.,...&Yang,Shuhong.(2017).Sunspot Light Walls Suppressed by Nearby Brightenings.ASTROPHYSICAL JOURNAL LETTERS,843(1). |
| MLA | Yang, Shuhong,et al."Sunspot Light Walls Suppressed by Nearby Brightenings".ASTROPHYSICAL JOURNAL LETTERS 843.1(2017). |
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来源：国家天文台
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