Coronal Hole Oscillations as inferred from SDO/AIA data

被引：2
|
作者：
Hegde, M. [1 ,2 ]
Hiremath, K. M. [1 ]
Vijayakumar, Doddamani H. [2 ]
机构：
[1] Indian Inst Astrophys, Bangalore 560034, Karnataka, India
[2] Bangalore Univ, Dept Phys, Bangalore 560056, Karnataka, India
来源：
ADVANCES IN SPACE RESEARCH | 2014年 / 54卷 / 02期
关键词：
SDO/AIA data; Coronal hole; Flux tube; Oscillations; LONGITUDINAL INTENSITY OSCILLATIONS; BRIGHT POINTS; SOLAR-WIND; TRANSVERSE OSCILLATIONS; SUNSPOT OSCILLATIONS; INITIAL OBSERVATIONS; PERIOD OSCILLATIONS; MEASURED PARAMETERS; LOOP OSCILLATIONS; WAVE-PROPAGATION;
D O I：
10.1016/j.asr.2014.04.001
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
With high temporal resolution (12 s) of about two hours duration, data of a coronal hole structure in 171 angstrom, 193 angstrom and 211 angstrom taken from SDO/AIA images is considered for examination of oscillations. After estimating the total DN counts of a whole coronal hole structure in three wavelength bands, the resulting time series are subjected to FFT and wavelet analysis. Significant periods in all the three wavelength bands are detected that are mainly concentrated around 500 s as a fundamental mode and its odd (167, 100, 71, 56, 46, 39, 33, 29, 26, 24 s) harmonics. Computed phases in all the three wavelengths band are estimated to be constant. (C) 2014 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：272 / 280
页数：9
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