IMAGING OBSERVATION OF QUASI-PERIODIC DISTURBANCES' AMPLITUDES INCREASING WITH HEIGHT IN THE POLAR REGION OF THE SOLAR CORONA
文献类型：期刊论文
| 作者 | Su, J. T.1,2; Liu, Y.3 ; Shen, Y. D.3; Priya, T. G.1,4
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2014-08-01 |
| 卷号 | 790期号:2 |
| 关键词 | Sun: corona Sun: magnetic fields Sun: oscillation |
| 英文摘要 | At present, there have been few extreme ultraviolet (EUV) imaging observations of spatial variations of the density perturbations due to the slow magnetoacoustic waves (SMWs) propagating along the solar coronal magnetic fields. In this paper, we present such observations taken from the polar region of the corona with the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory and investigate the amplitude of quasi-periodic propagating disturbances that increase with height in the lower corona (0-9 Mm over the solar limb). We statistically determined the following parameters associated with the disturbances: pressure scale height, period, and wavelength in AIA 171 angstrom, 193 angstrom, and 211 angstrom channels. The scale height and wavelength are dependent of temperature, while the period is independent of temperature. The acoustic velocities inferred from the scale height highly correlate with the ratios of wavelength to period, i.e., phase speeds. They provide evidence that the propagating disturbances in the lower corona are likely SMWs and the spatial variations in EUV intensity in the polar region likely reflects the density compressional effect by the propagating SMWs. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000339115800067 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6469]  |
| 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, State Key Lab Space Weather, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Su, J. T.,Liu, Y.,Shen, Y. D.,et al. IMAGING OBSERVATION OF QUASI-PERIODIC DISTURBANCES' AMPLITUDES INCREASING WITH HEIGHT IN THE POLAR REGION OF THE SOLAR CORONA[J]. ASTROPHYSICAL JOURNAL,2014,790(2). |
| APA | Su, J. T.,Liu, Y.,Shen, Y. D.,&Priya, T. G..(2014).IMAGING OBSERVATION OF QUASI-PERIODIC DISTURBANCES' AMPLITUDES INCREASING WITH HEIGHT IN THE POLAR REGION OF THE SOLAR CORONA.ASTROPHYSICAL JOURNAL,790(2). |
| MLA | Su, J. T.,et al."IMAGING OBSERVATION OF QUASI-PERIODIC DISTURBANCES' AMPLITUDES INCREASING WITH HEIGHT IN THE POLAR REGION OF THE SOLAR CORONA".ASTROPHYSICAL JOURNAL 790.2(2014). |
入库方式： OAI收割
来源：国家天文台
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