The missing UV absorption lines of NGC 4151

In this paper we discuss new, near-simultaneous high-dispersion long- and short-wavelength International Ultraviolet Explorer (IUE) observations of the Seyfert galaxy NGC 4151. Previous observations revealed a narrow absorption system in Mg II not present in Ly α or C IV. The new observations confir...

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Veröffentlicht in:	Monthly notices of the Royal Astronomical Society 1991-03, Vol.249 (1), p.24P-27P
Hauptverfasser:	Leech, K. J., Penston, M. V., Snijders, M. A. J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Earth, ocean, space Exact sciences and technology Quasars. Active or peculiar galaxies, objects, and systems Stellar systems. Galactic and extragalactic objects and systems. The universe
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Beschreibung
Zusammenfassung:	In this paper we discuss new, near-simultaneous high-dispersion long- and short-wavelength International Ultraviolet Explorer (IUE) observations of the Seyfert galaxy NGC 4151. Previous observations revealed a narrow absorption system in Mg II not present in Ly α or C IV. The new observations confirm the presence of this system in Mg II and its absence in the other lines. Possible reasons for this are discussed. It is hoped this paper will stimulate Hubble Space Telescope (HST) studies of NGC 4151.
ISSN:	0035-8711 1365-2966
DOI:	10.1093/mnras/249.1.24P