The ultraviolet absorption spectrum of NGC 4151

Details The ultraviolet absorption spectrum of NGC 4151 The ultraviolet absorption spectrum of NGC 4151

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...150..317v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 150, no. 2, Sept. 1985, p. 317-324.

Astronomy and Astrophysics

Astrophysics

6

Absorption Spectra, Galactic Nuclei, Molecular Clouds, Seyfert Galaxies, Ultraviolet Spectra, Emission Spectra, Hydrogen, Light Curve, Quasars

Scientific paper

The analysis of all available low dispersion, short wavelength, large aperture IUE spectra of NGC 4151 taken prior to March 1982 shows a linear correlation between the depth of the absorption lines and the strength of the underlying emission; the absorption lines vanish while the continuum is still measurable. This is interpreted as being due to an absorbing cloud covering a compact, variable central source and the broad-line emitting region while a second, non-variable, continuum source (possibly a jet) lies at some distance, uncovered by the absorbing cloud.

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