T he ultraviolet Sun

Abstract. High-resolution ultraviolet observations of the Sun from SOHO and TRACE spacecraft have provided a wealth of new information on plasma temperature, density, abundance anomaly, plasma flows, turbulence, wave motions, etc., in various solar structures. We briefly present solar physics research of our group, and review some of the new results from the SUMER spectrograph on the SOHO spacecraft, especially the widths of vacuum ultraviolet spectral lines in the equatorial solar corona observed with CDS and SUMER