The EUV Spectrum of Sunspot Plumes Observed by SUMER on SOHO
Dwivedi, B. N.; Curdt, W.; Feldman, U.
Germany, India, United States
Abstract
We present results from sunspot observations obtained by SUMER on SOHO. In sunspot plumes the EUV spectrum differs from the quiet Sun; continua are observed with different slopes and intensities; emission lines from molecular hydrogen and many unidentified species indicate unique plasma conditions above sunspots. Sunspot plumes are sites of systematic downflow. We also discuss the properties of sunspot oscillations