SIMBAD references

2003ApJ...590...73X - Astrophys. J., 590, 73-85 (2003/June-2)

An active galactic nucleus sample with high X-Ray-to-Optical flux ratio from RASS. II. Optical emission line properties of Seyfert 1-Type active galactic nuclei.

XU D.W., KOMOSSA S., WEI J.Y., QIAN Y. and ZHENG X.Z.

Abstract (from CDS):

This work studies the optical emission line properties of a sample of 155 low-redshift bright X-ray-selected ROSAT Seyfert 1-type active galactic nuclei for which adequate signal-to-noise ratio spectroscopic observations are available. We measured emission-line properties by performing multicomponent fits to the emission-line profiles, covering the effect of blended iron emission. We also obtained continuum parameters, including 250 eV 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 Hβ redshift (or blueshift) and flux ratios of Fe II to Hβ broad component and [O III] to Hβ narrow component. These trends are most likely driven by the Eddington ratio.

Abstract Copyright:

Journal keyword(s): Galaxies: Seyfert - Galaxies: Quasars: Emission Lines - X-Rays: Galaxies

VizieR on-line data: <Available at CDS (J/ApJ/590/73): table1.dat>

Simbad objects: 157

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2019.12.10-09:24:27

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