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Characteristics of Active Galactic Nuclei in the Ultraviolet

Kautsch, S. J.; Zeilinger, W. W.

A sample of UV spectra of the central region of 28 early-type galaxies with signatures of nuclear activity is produced by collecting spectra from the on-line archive of the International Ultraviolet Explorer (IUE) satellite mission. We present a comparison of line flux measurements and the spectral energy distribution (SED) of these objects. The r…

Element Identifications in the UV Spectrum of HR 465

Fuhrmann, K.

High resolution IUE spectra of HR 465 were investigated. Line identifications for C, N, Eu, and Pt are presented, the occurrence of some other elements discussed.

Variable mass-flux in Be stars

Doazan, V.; Thomas, R. N.

The available observational data concerning the variability of Be stars is briefly reviewed, and some different hypotheses concerning the origin of Be variability are examined. It is shown that variability in Be stars is not restricted to short time scales. In fact, long term variations (such as 'E/C' variations of the intensity of the emission co…