Relations Among Emission Lines And Continuum Luminosity In Active Galactic Nuclei

We have investigated the line-continuum relations by using an AGN SDSS sample. For the first time we have considered H alpha and [N II] emission lines in the line-continuum analysis. Also, in order to find more details, we decomposed complex profiles of Balmer lines (H alpha and H beta) oil three components (NLR, ILR and BLR) which are coming from different line emission regions and we examine line components-continuum relations. Numerous Fe II lines (lambda lambda 4450-5350 angstrom) are separated in the three groups ((4)F, (6)S and (4)G), according to atomic properties of their transitions, and each Fe II line group is compared separately with continuum luminosity. Indications of Baldwin effect are found for the [O III], [N II] and NLR component of H beta, but trends of inverse Baldwin effect are observed for the Fe II (6)S line group, H beta BLR, H alpha ILR and specially for the H alpha BLR component. Different trends in line-continuum relations required further investigations, to explain their physical background.