A spectrophotometric study of Seyfert galaxies - Physical conditions of the emitting gas

Details A spectrophotometric study of Seyfert galaxies - Physical conditions of the emitting gas A spectrophotometric study of Seyfert galaxies - Physical conditions of the emitting gas

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103..888c&link_type=abstract

(Rice University and University of Texas, Texas-Mexico Conference on Astrophysics: Plasmas in Astrophysics, 3rd, Rice University

Astronomy and Astrophysics

Astrophysics

3

Abundance, Astronomical Photometry, Forbidden Transitions, Interstellar Chemistry, Seyfert Galaxies, Spectrophotometry, Heavy Elements, Helium, Oxygen Spectra, Photoionization, Red Shift

Scientific paper

A spectrophotometric study of a sample of 52 Seyfert galaxies is presented. The main results are: (1) the densities in the O III forbidden-line zone are high (100,000-1,000,000/cu cm), (2) the helium abundance is roughly solar, while the heavy element abundances (oxygen and neon) are subsolar, and (3) the comparison with the photoionization models of Stasinska (1984) suggests that the photoionization mechanism for line formation is dominant in the narrow-line regions.

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