Abstract
Recently a new kind of damped oscillations of hot coronal loops was revealed by the Solar Ultraviolet Measurements of Emitted Radiation (SUMER) spectrometer on SOHO (Kliem et al. 2002; Wang et al. 2002a, b, c). Observations of 17 flarelike events show that the oscillations have periods of 11−31 min, with a decay time of 5.5−29 min, and show an initial large Doppler shift pulse (up to 200 km s−1). The oscillations were interpreted in terms of standing slow or kink magnetosonic modes. An 1D MHD simulation by Ofman & Wang (2002) shows that slow waves can be damped quickly on a time scale comparable to observations due to the large thermal conduction in a hot coronal loop.
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