Wednesday

Plasma oscillations involving a density perturbation moving back and forth between the foot points of a hot coronal loop have been reported recently using high-resolution imaging observations from the SDO/AIA. These oscillations, often referred to as "sloshing oscillations", exhibit properties very similar to the standing slow waves that were observed much earlier with the SoHO/SUMER and other spectroscopic instruments. In this work, we investigate the relation between them using multi-wavelength observations. We further extract some important oscillation properties and show that they are consistent with the slow wave damping due to thermal conduction in a cooling plasma. A possible explanation for the distinct oscillation characteristics observed in different wavelength channels will also be discussed.