NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-20 T18:37:34 PDT
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For refcode 1993PASP..105.1038V:
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Copyright by Astronomical Society of the Pacific. Reproduced by permission
1993PASP..105.1038V The Line-Emitting Gas in Active Galaxies: A Probe of the Nuclear Engine SYLVAIN VEILLEUX National Optical Astronomy Observatories, P. O. Box 26732, Tucson, Arizona 85726-6732 Electronic mail: veilleux@noao.edu Received 1993 March 8; accepted 1993 June 30 ABSTRACT. This paper reviews some of the basic questions regarding the structure of the engine powering active galactic nuclei (AGN), the nature of the interaction between the AGN and the host galaxy, and the origin and evolution of AGN. The study of the dynamics and physical characteristics of the line-emitting gas in these objects has proven fruitful in addressing many of these issues. Recent advances in optical and infrared detector technology combined with the development of superior ground-based instruments have produced efficient new tools for the study of the line-emitting gas on nuclear (R <~ 1 pc) and galactic (R ~> 50 pc) scales. Programs which take advantage of two of these new techniques, Fabry-Perot imaging spectroscopy and infrared spectroscopy, are described in this paper. The origin of nuclear activity in galaxies is also addressed in a third project which aims at determining the nature of luminous infrared galaxies.
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