Other
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..134m&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Feb. 1986, p. 134-139.
Other
5
Active Galactic Nuclei, Cosmic Gases, Interstellar Gas, Quasars, Seyfert Galaxies, Cosmic Dust, Gas Density, Interstellar Extinction, Line Spectra, Photoionization
Scientific paper
An overview of line-emitting regions in active galactic nuclei (AGN) is presented. Most existing AGN gas line-intensity measurements are accounted for by detailed photoionization models used in conjunction with spectrophotometric observations. The Seyfert 1 galaxy and quasar picture includes gravity as the primary energy source, and a black hole of 1-10 billion solar masses with a radiating accretion disk. None of the model principal input parameters, which describe physical, chemical, geometric, and energetic details of the picture, is unambiguously understood. Despite refinements in the model calculations from new atomic data, the predicted intensities of most stronger lines have not changed since the 1970's. Knowledge of the broad-line-emitting gas density is crucial for understanding the importance of various physical processes and of complicating effects such as reddening. Other modeling improvements are discussed.
No associations
LandOfFree
Gas in active galactic nuclei does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gas in active galactic nuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas in active galactic nuclei will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1678153