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The Complex Structure of the CIV Emission Line in the Seyfert 1 Galaxy NGC 4151 at Minimum States

Published online by Cambridge University Press:  07 August 2017

M.-H. Ulrich
M.-H. Ulrich*
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, D-8046 Garching bei München, F.R.G.

Extract

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NGC 4151 passes rather frequently through states of deep minima characterized by a weak UV continuum and a nearly complete fading of the broad components of CIV and other permitted lines. The phenomenon described in this short article is best observed during these minima [7]. Other properties of the UV and X-ray continuum and of the emission and absorption lines of NGC 4151 have been presented and discussed elsewhere [1–6].

Type
Part 2: BLR and Variability
Information
Symposium - International Astronomical Union , Volume 134: Active Galactic Nuclei , 1989 , pp. 120 - 121
Copyright
Copyright © Kluwer 1989 

References

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6 Ulrich, M.H. 1984, MNRAS, 206, 221 Google Scholar
7 Ulrich, M.H. 1985, Nature 313, 745 Google Scholar