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Omnipresent long-period intensity oscillations in open coronal structures
S. Krishna Prasad, D. Banerjee, T. Van Doorsselaere +1
Quasi-periodic propagating disturbances in coronal structures have been interpreted as slow magneto-acoustic waves and/or periodic upflows. Here we aim to understand their nature f…
Surface Alfven waves in solar flux tubes
M. Goossens, J. Andries, R. Soler +3
Magnetohydrodynamic (MHD) waves are ubiquitous in the solar atmosphere. Alfven waves and magneto-sonic waves are particular classes of MHD waves. These wave modes are clearly diffe…
Time delays in quasi-periodic pulsations observed during the X2.2 solar flare on 2011 February 15
L. Dolla, C. Marqué, D. B. Seaton +10
We report observations of quasi-periodic pulsations (QPPs) during the X2.2 flare of 2011 February 15, observed simultaneously in several wavebands. We focus on fluctuations on time…