Physics
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982msngr..30....4b&link_type=abstract
ESO Messenger, Dec. 1982, p. 4-6.
Physics
Emission Spectra, Galactic Nuclei, Iue, Seyfert Galaxies, Carbon, Continuous Spectra, Line Spectra, Quasars, Ultraviolet Spectra
Scientific paper
IUE spectra of seven known Seyfert galaxies were examined for common features shared with previously observed Seyfert 1 nuclei. The observations were made in the interval 1150-3200 A, with attention given to continuum points when emission or absorption lines, particle events or fiducial events were expected to be missing. Studies were made of NGC 3516, NGC 5548, Akn 120, NGC 3783, NGC 4593, NGC 7213, and ESO 113-IG45(F9). The UV continuum was found to vary in both shape and intensity between different epochs, and a hardening was detected with increasing intensity for all objects. Above 2000 A, the UV continuum in Seyfert spectra was found to be part of the 3000 A bump seen in quasar spectra. Finally, matter was not found to be distributed in the broad line region of Seyferts, where gas having different physical conditions and velocities can be characterized distinctly.
Boisson Catherine
Ulrich Marie-Helene
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