Other
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..159m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Sept. 1, 1987, p. 159-172. SERC-supported research
Other
3
Astronomical Models, Dynamic Models, Emission Spectra, Seyfert Galaxies, Spectral Line Width, Abundance, Astronomical Spectroscopy, Line Shape, Molecular Clouds, Stellar Winds
Scientific paper
Emission line ratios and profiles are obtained for the catapult model of the narrow line region of Seyfert galaxies. Seyfert 1 line ratios are computed by adding a cloud component which is not ejected, and the predicted line ratios for Seyfert 1s agree to better than 1-sigma with the observed values. A wide range of widths are found for the various lines, giving a reasonable agreement with the proportionality between widths at 1/2 and 1/4 peak intensity. The internal cloud structure for most of the diagnostic lines is found to be unimportant in determining the gross features of the emission. It is suggested that the sulfur lines in an isothermal cloud are mainly produced in low density regions, indicating their usefulness as a diagnostic in the study of the internal cloud structure.
Mobasher Bahram
Raine Derek J.
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