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- Title
Oscillatory Behavior in the Corona.
- Authors
Calabro, B.; McAteer, R.; Bloomfield, D.
- 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.
- Subjects
ASTROPHYSICS; SEISMOLOGY; IMAGE analysis; PIXELS; ULTRAVIOLET astronomy; SOLAR cycle
- Publication
Solar Physics, 2013, Vol 286, Issue 2, p405
- ISSN
0038-0938
- Publication type
Article
- DOI
10.1007/s11207-013-0283-y