Oscillatory Behavior in the Corona

被引:2
作者
Calabro, B. [1 ]
McAteer, R. T. J. [1 ]
Bloomfield, D. S. [2 ]
机构
[1] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA
[2] Trinity Coll Dublin, Sch Phys, Astrophys Res Grp, Dublin 2, Ireland
基金
美国国家科学基金会;
关键词
Sun:; oscillations; corona; Regions: active Sun; quiet Sun; coronal holes; Analysis: wavelet; TRANSITION-REGION; AUTOMATED DETECTION; WAVES;
D O I
10.1007/s11207-013-0283-y
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We detect and analyze the oscillatory behavior of waves using a coronal seismology tool on sequences of coronal images. We study extreme-ultraviolet image sequences of active and quiet Sun regions and of coronal holes we identify 3- and 5-minute periodicities. In each studied region the 3- and 5-minute periodicities are similarly frequent. The number of pixels exhibiting a 3-minute periodicity is between 6 % -aEuro parts per thousand 8 % and those pixels exhibiting a 5-minute periodicity is between 5 % -aEuro parts per thousand 9 % of the total number of observed pixels. Our results show 3-minute oscillations along coronal loop structures but do not show 5-minute oscillations along these same loop structures. The number of pixels exhibiting 3- and 5-minute periodicities in one type of region (active Sun, quiet Sun, and coronal holes) is roughly the same for all observed regions, leading us to infer that the 3- and 5-minute oscillations are the result of a global mechanism.
引用
收藏
页码:405 / 415
页数:11
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