OSCILLATING LIGHT WALL ABOVE A SUNSPOT LIGHT BRIDGE
文献类型：期刊论文
| 作者 | Yang, Shuhong1 ; Zhang, Jun1; Jiang, Fayu1; Xiang, Yongyuan2; Yang,Shuhong; Jiang,Fayu; Zhang,Jun
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| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2015-05-10 |
| 卷号 | 804期号:2 |
| 关键词 | sunspots Sun: atmosphere Sun: oscillations Sun: UV radiation |
| 英文摘要 | With the high tempo-spatial Interface Region Imaging Spectrograph 1330 angstrom images, we find that many bright structures are rooted in the light bridge of NOAA 12192, forming a light wall. The light wall is brighter than the surrounding areas, and the wall top is much brighter than the wall body. The New Vacuum Solar Telescope H alpha and the Solar Dynamics Observatory 171 and 131 angstrom images are also used to study the light-wall properties. In 1330, 171, and 131 angstrom, the top of the wall has a higher emission, while in the H alpha line, the wall-top emission is very low. The wall body corresponds to bright areas in 1330 angstrom and dark areas in the other lines. The top of the light wall moves upward and downward successively, performing oscillations in height. The deprojected mean height, amplitude, oscillation velocity, and the dominant period are determined to be 3.6 Mm, 0.9 Mm, 15.4 km s(-1), and 3.9 minutes, respectively. We interpret the oscillations of the light wall as the leakage of p-modes from below the photosphere. The constant brightness enhancement of the wall top implies the existence of some kind of atmospheric heating, e.g., via the persistent small-scale reconnection or the magneto-acoustic waves. In another series of 1330 angstrom images, we find that the wall top in the upward motion phase is significantly brighter than in the downward phase. This kind of oscillation may be powered by the energy released due to intermittent impulsive magnetic reconnection. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000354293200001 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5708]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Yunnan Observ, Fuxian Solar Observ, Kunming 650011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Shuhong,Zhang, Jun,Jiang, Fayu,et al. OSCILLATING LIGHT WALL ABOVE A SUNSPOT LIGHT BRIDGE[J]. ASTROPHYSICAL JOURNAL LETTERS,2015,804(2). |
| APA | Yang, Shuhong.,Zhang, Jun.,Jiang, Fayu.,Xiang, Yongyuan.,Yang,Shuhong.,...&Zhang,Jun.(2015).OSCILLATING LIGHT WALL ABOVE A SUNSPOT LIGHT BRIDGE.ASTROPHYSICAL JOURNAL LETTERS,804(2). |
| MLA | Yang, Shuhong,et al."OSCILLATING LIGHT WALL ABOVE A SUNSPOT LIGHT BRIDGE".ASTROPHYSICAL JOURNAL LETTERS 804.2(2015). |
入库方式： OAI收割
来源：国家天文台
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