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18 April 2024 |
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An AGN Sample with High X-ray-to-optical Flux Ratio from RASS II.Optical Emission Line Properties of Seyfert 1 Type AGN | | D.W. Xu
; Stefanie Komossa
; J.Y. Wei
; Y. Qian
; X.Z. Zheng
; | | Date: |
9 Jun 2003 | | Journal: | Astrophys.J., 590 (2003) 73-85 | | Subject: | astro-ph | | Abstract: | This work studies the optical emission line properties of a sample of 155 low-redshift bright X-ray selected ROSAT Seyfert~1 type AGN for which adequate signal-to-noise ratio spectroscopic observations are available. We measured emission line properties by performing multi-component fits to the emission line profiles, covering the effect of blended iron emission. We also obtained continuum parameters, including 250eV X-ray luminosities derived from the ROSAT database. In addition, the measured properties are gathered for a correlation analysis, which confirms the well-known relations between the strengths of Fe~II, [O III] emission and the X-ray slope. We also detect striking correlations between H$eta$ redshift (or blueshift), flux ratios of Fe `II to H$eta$ broad component and [O III] to H$eta$ narrow component. These trends are most likely driven by the Eddington ratio. | | Source: | arXiv, astro-ph/0306169 | | Services: | Forum | Review | PDF | Favorites | |
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