Virilization of the Broad Line Region in Active Galactic Nuclei - connection between shifts and widths of broad emission lines

Abstract

We investigate the virilization of the emission lines Hbeta and Mg II in the sample of 287 Type 1 Active Galactic Nuclei taken from the Sloan Digital Sky Survey database. We explore the connections between the intrinsic line shifts and full widths at different levels of maximal intensity. We found that: (i) Hbeta seems to be a good virial estimator of black hole masses, and an intrinsic redshift of Hbeta is dominantly caused by the gravitational effect, (ii) there is an anti-correlation between the redshift and width of the wings of the Mg II line, (iii) the broad Mg II line can be used as virial estimator only at 50% of the maximal intensity, while the widths and intrinsic shifts of the line wings can not be used for this purpose.

24 pages, 8 figures, 4 tables, accepted in Astrophysics and Space Science

References in corpus (8)

• The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements
• CIV 1549 as an Eigenvector 1 Parameter for Active Galactic Nuclei
• Black-Hole Mass and Growth Rate at High Redshift
• Hbeta Profiles in Quasars: Evidence for an Intermediate-line Region
• The UV and optical Fe II emission lines in type 1 AGNs
• Polarization in lines - a new method for measuring black hole masses in active galaxies
• Complex emission line region of Mrk 817
• The Broad Line Region of AGN: Kinematics and Physics

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• A new method to measure the virial factors in the reverberation mapping of AGNs
• Systematic Redshift of the Fe III UV Lines in Quasars. Measuring Supermassive Black Hole Masses under the Gravitational Redshift Hypothesis
• Measuring Supermassive Black Hole Masses: Correlation between the Redshifts of the Fe III UV Lines and the Widths of Broad Emission Lines
• Detecting subparsec super-massive binary black holes: Long termmonitoring perspective
• Kinematics of the H$\alpha$ and H$\beta$ broad line region in an SDSS sample of type 1 AGNs
• Black Hole Mass Estimation in Type 1 AGN: H$\beta$ vs. Mg II lines and the role of Balmer continuum
• Association of Optical, Ultraviolet and Soft X-ray excess Emissions in AGNs