Other
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984msngr..35...26v&link_type=abstract
ESO Messenger (ISSN 0722-6691), March 1984, p. 26-29.
Other
Absorption Spectra, Interstellar Matter, Seyfert Galaxies, Ultraviolet Absorption, Continuous Spectra, Emission Spectra, X Ray Spectra
Scientific paper
An analysis of NGC 4151's absorption line behavior has been conducted on the basis of 90 of the ESA data base's low dispersion, high resolution and large aperture UV spectra for the April 1978-February 1982 period. Attention is also given to features of the visible and X-ray spectra of this source. It is found that the continuum source is double, with one constant component and the other variable. The absorbing clouds cover the variable continuum source, as well as the broad emission line region.
Tarenghi Marco
Véron Pascal
Veron-Cetty M.-P.
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