The "red shelf" of the Hb line in the Seyfert 1 galaxies RXS J01177+3637 and HS 0328+05

Abstract

A few Seyfert 1s have a Hb profile with a red wing usually called the "red shelf". The most popular interpretation of this feature is that it is due to broad redshifted lines of Hb and [OIII]4959,5007; we have observed two Seyfert 1s displaying a "red shelf" and showed that in these two objects the main contributor is most probably the HeI 4922,5016 lines having the velocity and width of the broad Hb component. There is no evidence for the presence of a broad redshifted component of Hb or [OIII] in any of these two objects.

LaTeX file (uses AA vers. 5.1 class, enclosed), 8 pages, 9 figures. Accepted for publication in Astronomy & Astrophysics. Also available at http://www.obs-hp.fr/www/preprints.html

References in corpus (2)

• A spectrophotometric atlas of Narrow-Line Seyfert 1 galaxies
• Short-term emission line and continuum variations in Mrk110

Cited by in corpus (28)

• The unusual emission line spectrum of IZw1
• Broad-line Balmer Decrements in Blue Active Galactic Nuclei
• Correcting CIV-Based Virial Black Hole Masses
• The Lick AGN Monitoring Project 2011: Fe II Reverberation from the Outer Broad-Line Region
• Detailed Characterization of H_beta emission line profile in low z SDSS quasars
• The Near-Infrared Broad Emission Line Region of Active Galactic Nuclei -- I. The Observations
• Contribution of the Disk Emission to the Broad Emission Lines in AGNs: Two-component model
• Optical emission line properties of Narrow Line Seyfert 1s and comparison AGN
• New Estimators of Black Hole Mass in Active Galactic Nuclei with Hydrogen Paschen Lines
• Constraints on the Broad Line Region Properties and Extinction in Local Seyferts
• The structure of the Mg II broad line emitting region in Type 1 AGNs
• Evidence for an intermediate line region in AGN's inner torus region and its evolution from narrow to broad line Seyfert I galaxies
• A New Iron Emission Template for Active Galactic Nuclei. I. Optical Template for the H$\beta$ region
• Novel calibrations of virial black hole mass estimators in active galaxies based on X-ray luminosity and optical/NIR emission lines
• Evolution of [OIII]5007 emission-line profiles in narrow emission-line galaxies
• Detection of the Intermediate-width Emission Line Region in Quasar OI 287 with the Broad Emission Line Region Obscured by the Dusty Torus
• A Study of Outflows in Luminous Quasars at Redshift $\sim 0.4-0.8$
• The transient event in NGC 1566 from 2017 to 2019 -- I. An eccentric accretion disk and a turbulent, disk-dominated broad-line region unveiled by double-peaked Ca II and O I lines
• Spectroastrometry and Reverberation Mapping: the Mass and Geometric Distance of the Supermassive Black Hole in the Quasar 3C 273
• The case for inflow of the broad-line region of active galactic nuclei
• SDSS J163459.82+204936.0: A Ringed Infrared-Luminous Quasar with Outflows in both Absorption and Emission Lines
• Strong Response of the very broad h$\beta$ Emission Line in Luminous Radio-Quite Quasar pg1416-129
• The warm outer layer of a Little Red Dot as the source of [Fe II] and collisional Balmer lines with scattering wings
• Multiple Flares in the Changing-Look AGN NGC 5273
• A Direct Linkage Between AGN Outflows in The Narrow-line Regions and The X-ray Emission From The Accretion disks
• B3\,0749+460A: A New "Changing-Look" Active Galactic Nucleus Associated with X-ray Spectral Slope Variations
• Spatially Resolved [O III] Emission Line Kinematics of Reverberation-Mapped AGNs with the Keck Cosmic Web Imager
• Ultradense Gases beyond Dusty Torus in a Partially Obscured Quasar