Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. III. Detection of Fe II Reverberation in Nine Narrow-Line Seyfert 1 Galaxies

Abstract

This is the third in a series of papers reporting on a large reverberation-mapping campaign aimed to study the properties of active galactic nuclei (AGNs) with high accretion rates. We present new results on the variability of the optical Fe II emission lines in 10 AGNs observed by the Yunnan Observatory 2.4m telescope during 2012--2013. We detect statistically significant time lags, relative to the AGN continuum, in nine of the sources. This accurate measurement is achieved by using a sophisticated spectral fitting scheme that allows for apparent flux variations of the host galaxy, and several narrow lines, due to the changing observing conditions. Six of the newly detected lags are indistinguishable from the Hbeta lags measured in the same sources. Two are significantly longer and one is slightly shorter. Combining with Fe II lags reported in previous studies, we find a Fe II radius--luminosity relationship similar to the one for Hbeta, although our sample by itself shows no clear correlation. The results support the idea that Fe II emission lines originate in photoionized gas which, for the majority of the newly reported objects, is indistinguishable from the Hbeta-emitting gas. We also present a tentative correlation between the lag and intensity of Fe II and Hbeta and comment on its possible origin.

14 pages, 10 figures, accepted for publication in The Astrophysical Journal

References in corpus (6)

• The diversity of quasars unified by accretion and orientation
• A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
• A Systematic Analysis of Fe II Emission in Quasars: Evidence for Inflow to the Central Black Hole
• Supermassive black holes with high accretion rates in active galactic nuclei: II. the most luminous standard candles in the Universe
• On the size of the Fe II emitting region in the AGN Akn 120
• A Tentative Size-Luminosity Relation for the Iron Emission-Line Region in Quasars

Cited by in corpus (43)

• The Radius-Luminosity Relationship Depends on Optical Spectra in Active Galactic Nuclei
• A spectroscopic analysis of a sample of narrow-line Seyfert 1 galaxies selected from the Sloan Digital Sky Survey
• Supermassive black holes with high accretion rates in active galactic nuclei. XI. Accretion disk reverberation mapping of Mrk 142
• The Sloan Digital Sky Survey Reverberation Mapping Project: MgII Lag Results from Four Years of Monitoring
• Reverberation Mapping of the Broad-line Region in NGC 5548: Evidence for Radiation Pressure?
• Accretion Disk Size Measurements of Active Galactic Nuclei Monitored by the Zwicky Transient Facility
• Reverberation Mapping Measurements of Black Hole Masses and Broad-Line Region Kinematics in Mrk 817 and NGC 7469
• Calibration of the virial factor $f$ in supermassive black hole masses of reverberation-mapped AGNs
• A New Iron Emission Template for Active Galactic Nuclei. I. Optical Template for the H$\beta$ region
• Reverberation mapping of narrow-line Seyfert 1 galaxy I Zwicky 1: black hole mass
• Velocity-resolved Reverberation Mapping of Changing-look Active Galactic Nucleus NGC~4151 During Outburst Stage: Evidence for Kinematics Evolution of Broad-line Region
• Supermassive black holes with high accretion rates in active galactic nuclei: X. Optical variability characteristics
• Supermassive Black Hole and Broad-line Region in NGC~5548: Results from Five-season Reverberation Mapping
• Broad-line Region of the Quasar PG 2130+099 from a Two-Year Reverberation Mapping Campaign with High Cadence
• Do reverberation-measured H$\beta$ quasars provide a useful test of cosmology?
• Active Galactic Nuclei with Ultra-fast Outflows Monitoring Project: The Broad-line Region of Mrk 79 as a Disk Wind
• Fe II emission in active galactic nuclei
• Fe III emission in quasars: evidence for a dense turbulent medium
• Detection of a Multi-Phase Ultra-Fast Wind in the Narrow-Line Seyfert 1 Galaxy Mrk 1044
• On the relation between hard X-ray photon index versus accretion rate for super-Eddington accreting quasars
• Systematic Broad-band X-ray Study of super-Eddington Accretion onto Supermassive Black Holes. I. X-ray Continuum
• High Eddington quasars as discovery tools: current state and challenges
• Improving the Flux Calibration in Reverberation Mapping by Spectral Fitting: Application to the Seyfert Galaxy MCG--6-30-15
• Black hole mass estimation using X-ray variability measurements in Seyfert galaxies
• Relation between the variations in the MgII $\lambda 2798$ emission-line and the 3000 Å continuum
• The Sloan Digital Sky Survey Reverberation Mapping Project: Composite Lags at $z\lesssim 1$
• Wavelength-resolved reverberation mapping of intermediate redshift quasars HE 0413-4031 and HE 0435-4312: Dissecting Mg II, optical Fe II, and UV Fe II emission regions
• Reverberation Mapping of PG 0934+013 with the Southern African Large Telescope
• Wavelength-resolved Reverberation Mapping of quasar CTSC30.10: Dissecting MgII and FeII emission regions
• Wavelength Dependences of the Optical/UV and X-ray Luminosity Correlations of Quasars
• Medium-band Photometry Reverberation Mapping of Nearby Active Galactic Nuclei
• Unveiling the quasar main sequence: illuminating the complexity of active galactic nuclei and their evolution
• Measuring the Virial Factor in SDSS DR5 Quasars with Redshifted H$\beta$ and Fe ii Broad Emission Lines
• Extreme Variability Quasars in Their Various States. II: Spectral Variation Revealed with Multi-epoch Spectra
• Influence of the optical Fe II quasi-continuum on measuring the spectral parameters of active galactic nuclei
• The variability of the broad-line Balmer decrement for quasars from the Sloan Digital Sky Survey Reverberation Mapping
• The ${\sigma }_{\mathrm{H}\beta }$-based dimensionless accretion rate and its connection with the corona for AGN
• Spectral variability studies in Active Galactic Nuclei: Exploring continuum and emission line regions in the age of LSST and JWST
• Measuring the Virial Factor in SDSS DR7 AGNs with Redshifted H$\beta$ and H$\alpha$ Broad Emission Lines
• Revisiting Emission-Line Measurement Methods for Narrow-Line Active Galactic Nuclei
• Searching for signatures of Fe II atomic processes in spectra of active galactic nuclei
• Optical Spectroscopy of Four Young Radio Sources
• Reverberation Mapping of Two Luminous Quasars: the Broad-line Region Structure and Black Hole Mass