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Spectral evolution of galaxies. II. an atlas of IUE spectra of late type stars and nearby early type stellar systems.
Bruzual, G. A.
Low dispersion lUE spectra are presented in both pictorial and tabular form for late type stars, globular clusters, and elliptical galaxies. Average spectra are computed for types of objects with more than one observed spectrum.
High dispersion IUE observations of the planetary nebula NGC 3918.
Torres-Peimbert, S.; Peña, M.
The authors have measured absolute fluxes of the lines present in a IUE high dispersion short wavelength exposure of NGC 3918. The mean electron density derived is 5×103 cm-3, in agreement with previous determinations. An anomalous value of 1.2 ± 0.1 for the ratio λλ1239/1243 of N V is found. Its implications are discussed.