Molecular hydrogen lines observed with SUMER in the spectrum of a sunspot

We present spectra in which emission lines of molecular hydrogen have been found in the SUMER spectral range. Lines have been found solely over sunspot regions at wavelengths above 100nm. Mostly the emission of the molecular hydrogen band system is too weak to be observed among the spectra of hotter plasmas. Most lines had been observed previously with HRTS and identified by Bartoe et al. (1979). Only fluorescence lines, excited by coincidence with emission of other solar lines, have been found strong enough. One series of fluorescence lines is particularly strong. The relative intensities of these lines could be determined and compared with their transition probabilities. They are in good agreement.