High-frequency Decayless Waves with Significant Energy in Solar Orbiter/EUI Observations

Abstract High-frequency wave phenomena present a great deal of interest as one the possible candidates to contribute energy input required heat corona part alternating current heating theory. However, resolution imaging instruments up until Solar Orbiter has made it impossible resolve necessary time and spatial scales. The paper reports on high-frequency transverse motions in small loop located quiet-Sun region corona. oscillations were observed with High Resolution Imager Extreme Ultraviolet telescope (17.4 nm) instrument board Orbiter. We detect two short loops lengths 4.5 11 Mm. shorter displays an oscillation 14 s period longer 30 period. Despite high resolution, no definitive identification propagating or standing waves is possible. velocity amplitudes are found be equal 72 125 km −1 , respectively, for loops. Based that, we also estimated values flux contained loops—the 1.9 kW m −2 that 6.5 . While these have been quiet Sun, their fluxes same order active solar Numerical simulations performed reproduce oscillations. correspondence numerical results observations provides support estimates content observations. Such densities not yet decayless coronal waves, this promising models based damping.