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| Paper: |
The Metallicity-Luminosity Relationship in AGN: The Case of Narrow Line Seyfert 1 Galaxies. |
| Volume: |
290, Active Galactic Nuclei: from Central Engine to Host Galaxy |
| Page: |
255 |
| Authors: |
Shemmer, O.; Netzer, H.; Oliva, E.; Maiolino, R. |
| Abstract: |
Our new metallicity measurements (based on the Hamann & Ferland 1993 method) for a sample of AGN, including several NLS1s, indicate that while most broad-line AGN show a clear metallicity-luminosity correlation, NLS1s, that were not included in the original Hamann & Ferland analysis, deviate significantly from this relationship at low luminosities. If BLR metallicities, in all AGN, are accurately derived by the Hamann & Ferland method, then the high values we detect in NLS1s match those of some high-redshift high-luminosity quasars. This suggests that the metallicity-luminosity relationship is not a simple two-parameter dependence and that the hidden parameter may be related to a fundamental AGN physical property, such as the accretion rate, or the age of the central black hole. |
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