Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.216..817w&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 216, Oct. 15, 1985, p. 817-855. SERC-supported research
Astronomy and Astrophysics
Astronomy
80
Active Galaxies, Astronomical Spectroscopy, Emission Spectra, Galactic Radiation, High Dispersion Spectrographs, Seyfert Galaxies, Astronomical Catalogs, H Beta Line, Line Spectra, Oxygen Spectra
Scientific paper
High-dispersion observations of different narrow emission line profiles are presented for a sample of nine galaxies. Some causes of profile differences are examined, including velocity gradients and line ratio gradients. The observations were combined with previous profile observations to give a total sample of 23 active galaxies, comprising eight Seyfert 2s; five Seyfert 1s; nine intermediate Seyferts; and one LINER. A parameter Sigma is defined which characterizes the degree of forbidden profile width difference within each object. A strong correlation between Sigma and the strength of the broad line region was found. Correlations between FWHM and the critical density, Nc, and ionization potential X, were also analyzed, and the results are discussed. It is shown that the correlations with Nc tended to be stronger than those with X, suggesting that Nc is a more fundamental parameter. However, the forbidden line of O III was broader than the forbidden line of O I at 6300 A, indicating the opposite trend. A complete list of the emission line galaxies is given.
No associations
LandOfFree
The narrow line region of active galaxies. III - Profile comparisons 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 The narrow line region of active galaxies. III - Profile comparisons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The narrow line region of active galaxies. III - Profile comparisons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1547429