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.
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Acknowledgements
Calabro, B. is supported by NASA Grant # NNX09AB03G and an NMSU Undergraduate Research Initiative Grant (URIG) award. Bloomfield, D.S. was supported by a Marie Curie Intra-European Fellowship within the 7th European Community Framework programme and funding received under the European Space Agency PRODEX programme.
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Calabro, B., McAteer, R.T.J. & Bloomfield, D.S. Oscillatory Behavior in the Corona. Sol Phys 286, 405–415 (2013). https://doi.org/10.1007/s11207-013-0283-y
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DOI: https://doi.org/10.1007/s11207-013-0283-y