On magnesium monoxide lines in sunspot spectra

For use in the investigations of magnesium monoxide lines in sunspot spectra, values of Franck-Condon intensity factors for the red bands and the wavelength regions for the intense bands of the red and near-ultraviolet transitions of MgO are presented. The results indicate that a search for the lines of the red and near-ultraviolet bands in the sunspot spectra could resolve the questionable presence of MgO in sunspots.