Oscillatory Behavior in the Corona
Abstract
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 % - 8 % and those pixels exhibiting a 5-minute periodicity is between 5 % - 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.
- Publication:
-
Solar Physics
- Pub Date:
- September 2013
- DOI:
- 10.1007/s11207-013-0283-y
- Bibcode:
- 2013SoPh..286..405C
- Keywords:
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- Sun: oscillations;
- corona;
- Regions: active Sun;
- quiet Sun;
- coronal holes;
- Analysis: wavelet