EUV Spectroscopy of the Sunspot Region NOAA 7981 Using SOHO - II. Velocities and Line Profiles
Harrison, R. A.; Wilhelm, K.; Fredvik, T.; Kjeldseth-Moe, O.; Haugan, S. V. H.; Brekke, P.; Thompson, W. T.; Pike, C. D.; Brynildsen, N.; Maltby, P.; Rimmele, T.
Norway, United Kingdom, United States, Germany
Abstract
We have studied the dynamics in the sunspot transition region between the chromosphere and the corona and investigated the extension of the flow field into the corona. Based on EUV spectra of a medium size sunspot and its surroundings, NOAA 7981, observed with CDS and SUMER on SOHO, we derive line-of-sight velocities and study the line profiles for a series of emission lines.