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IMAGING OBSERVATION OF QUASI-PERIODIC DISTURBANCES' AMPLITUDES INCREASING WITH HEIGHT IN THE POLAR REGION OF THE SOLAR CORONA
Su, JT1,2; Liu Y(刘煜)3; Shen YD(申远灯)3; Priya, TG1,4; Su, JT (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2014-08-01
卷号790期号:2
DOI10.1088/0004-637X/790/2/150
产权排序第3完成单位
收录类别SCI
关键词Sun: Corona Sun: Magnetic Fields Sun: Oscillation
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.
项目资助者National Basic Research Program of China [2011CB8114001] ; Specialized Research Fund for State Key Laboratories [11373040, KJCX2-EW-T07, 11178005, 11221063, 11203036]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
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WOS记录号WOS:000339115800067
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]SLOW MAGNETOACOUSTIC WAVES ; PROPAGATING WAVES ; MAGNETOSONIC WAVES ; MAGNETIC-FIELDS ; TIME-SERIES ; MHD WAVES ; LOOPS ; OSCILLATIONS ; PLUMES ; EIT
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/7194
专题选址与日冕观测组
通讯作者Su, JT (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China.
作者单位1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
2.State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China
3.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
4.University of Chinese Academy of Sciences, Beijing 100049, China
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Su, JT,Liu Y,Shen YD,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, JT,Liu Y,Shen YD,Priya, TG,&Su, JT .(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, JT,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).
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