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

Abstract

We present the wavelength-resolved reverberation mapping (RM) of combined MgII and UV FeII broad-line emissions for two intermediate redshifts (z$\sim$1), luminous quasars - HE 0413-4031 and HE 0435-4312, monitored by the SALT and 1-m class telescopes between 2012-2022. Through this technique, we aim to disentangle the Mg II and FeII emission regions and to build a radius-luminosity relation for UV FeII emission, which has so far remained unconstrained. Several methodologies have been applied to constrain the time delays for total MgII and FeII emissions. In addition, this technique is performed to quantify the inflow or outflow of broad-line region gas around the supermassive black hole and to disentangle the emission/emitting regions from lines produced in proximity to each other. The mean total FeII time delay is nearly equal to the mean total Mg II time delay for HE 0435-4312 suggesting a co-spatiality of their emissions. However, in HE 0413-4031, the mean FeII time delay is found to be longer than the mean MgII time delay, suggesting that FeII is produced at longer distances from the black hole. The UV Fe II R-L relation is updated with these two quasars and compared with the optical FeII relation, which suggests that the optical FeII region is located further than the UV FeII by a factor of 1.7-1.9 i.e. $R_{\mathrm{FeII}-\mathrm{opt}}\sim (1.7-1.9)R_{\mathrm{FeII}-\mathrm{UV}}$. We detected a weak pattern in the time delay vs. wavelength relation, suggesting that the MgII broad-line originates a bit closer to the SMBH than the UV FeII, however, the difference is not very significant. Comparison of MgII, UV, and optical FeII R-L relations suggests that the difference may be larger for lower-luminosity sources, possibly with the MgII emission originating further from the SMBH. In the future, more RM data will be acquired to put better constraints on these trends, in particular the UV FeII R-L relation.

arXiv comment24 pages, 16 figures, 5 tables, Accepted for publication in A&A, in Press

References in corpus (69)

• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Composite Quasar Spectra From the Sloan Digital Sky Survey
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• Revisiting the Unified Model of Active Galactic Nuclei
• The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
• Are the Variations in Quasar Optical Flux Driven by Thermal Fluctuations?
• On Uncertainties in Cross-Correlation Lags and the Reality of Wavelength-Dependent Continuum Lags in Active Galactic Nuclei
• An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
• Reverberation Mapping of High-Luminosity Quasars: First Results
• Reverberation Mapping Measurements of Black Hole Masses in Six Local Seyfert Galaxies
• An Alternative Approach To Measuring Reverberation Lags in Active Galactic Nuclei
• Is Quasar Optical Variability a Damped Random Walk?
• Multiwavelength Monitoring of the Dwarf Seyfert 1 Galaxy NGC 4395. I. A Reverberation-Based Measurement of the Black Hole Mass
• The origin of the Broad Line Region in Active Galactic Nuclei
• Spatially resolved rotation of the broad-line region of a quasar at sub-parsec scale
• Fe II Emission in 14 Low-Redshift Quasars: I - Observations
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. IV. H$\beta$ Time Lags and Implications for Super-Eddington Accretion
• The Sloan Digital Sky Survey Reverberation Mapping Project: H$\alpha$ and H$\beta$ Reverberation Measurements From First-year Spectroscopy and Photometry
• Reverberation mapping of Active Galactic Nuclei: from X-ray corona to dusty torus
• Reverberation Mapping Results for Five Seyfert 1 Galaxies
• Bolometric correction factors for Active Galactic Nuclei
• Accretion disk wind in the AGN broad-line region: Spectroscopically resolved line profile variations in Mrk110
• The Lick AGN Monitoring Project 2011: Fe II Reverberation from the Outer Broad-Line Region
• A new cosmological distance measure using AGN
• A Systematic Analysis of Fe II Emission in Quasars: Evidence for Inflow to the Central Black Hole
• The Structure of the Broad-Line Region In Active Galactic Nuclei. II. Dynamical Modeling of Data from the AGN10 Reverberation Mapping Campaign
• The Sloan Digital Sky Survey Reverberation Mapping Project: First Broad-line Hbeta and MgII Lags at z>~0.3 from six-Month Spectroscopy
• The Lick AGN Monitoring Project: Velocity-Delay Maps from the Maximum-Entropy Method for Arp 151
• The effect of nuclear gas distribution on the mass determination of supermassive black holes
• Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. III. Detection of Fe II Reverberation in Nine Narrow-Line Seyfert 1 Galaxies
• The Sloan Digital Sky Survey Reverberation Mapping Project: Initial CIV Lag Results from Four Years of Data
• Reverberation Mapping of Luminous Quasars at High-z
• Kinematics of the Broad-line Region of 3C 273 from a Ten-year Reverberation Mapping Campaign
• The Quasar Main Sequence explained by the combination of Eddington ratio, metallicity and orientation
• Photometric AGN reverberation mapping - an efficient tool for BLR sizes, black hole masses and host-subtracted AGN luminosities
• Velocity-resolved reverberation mapping of five bright Seyfert 1 galaxies
• Modelling of the quasar main sequence in the optical plane
• The Sloan Digital Sky Survey Reverberation Mapping Project: MgII Lag Results from Four Years of Monitoring
• The spatially resolved broad line region of IRAS 09149-6206
• The central parsec of NGC 3783: a rotating broad emission line region, asymmetric hot dust structure, and compact coronal line region
• Monitoring AGNs with Hβ Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping
• The Sloan Digital Sky Survey Reverberation Mapping Project: The H$\beta$ Radius-Luminosity Relation
• Can reverberation-measured quasars be used for cosmology?
• The UV and optical Fe II emission lines in type 1 AGNs
• Towards equation of state of dark energy from quasar monitoring: Reverberation strategy
• CIV Black Hole Mass Measurements with the Australian Dark Energy Survey (OzDES)
• Time delay measurement of Mg II line in CTS C30.10 with SALT
• Time Delay of MgII Emission Response for the Luminous Quasar HE 0435-4312: Towards Application of High-Accretor Radius-Luminosity Relation in Cosmology
• Time-delay measurement of MgII broad line response for the highly-accreting quasar HE 0413-4031: Implications for the MgII-based radius-luminosity relation
• CLOUDY view of the warm corona
• Reverberation Mapping Measurements of Black Hole Masses and Broad-Line Region Kinematics in Mrk 817 and NGC 7469
• OzDES Reverberation Mapping Program: The first Mg II lags from five years of monitoring
• Evidence for Two Distinct Broad-Line Regions from Reverberation Mapping of PG 0026+129
• Standardizing reverberation-measured C IV time-lag quasars, and using them with standardized Mg II quasars to constrain cosmological parameters
• A High-Quality velocity-delay map of the broad-line region in NGC 5548
• The Sloan Digital Sky Survey Reverberation Mapping Project: Improving Lag Detection with an Extended Multi-Year Baseline
• Geometry and Kinematics in the Central Broad-Line Region of a Seyfert 1 Galaxy
• Broad-line Region of the Quasar PG 2130+099 from a Two-Year Reverberation Mapping Campaign with High Cadence
• Dark energy constraints from quasar observations
• Methods of Reverberation Mapping. I. Time-lag Determination by Measures of Randomness
• Do reverberation-measured H$\beta$ quasars provide a useful test of cosmology?
• Scatter Analysis Along the Multidimensional Radius-Luminosity Relations for Reverberation-Mapped Mg II Sources
• Broad line region and black hole mass of PKS 1510-089 from spectroscopic reverberation mapping
• Consistency study of high- and low-accreting Mg ii quasars: No significant effect of the Fe ii to Mg ii flux ratio on the radius-luminosity relation dispersion
• Fe II emission in active galactic nuclei
• The variability of optical \feii emission in PG QSO 1700+518
• A Tentative Size-Luminosity Relation for the Iron Emission-Line Region in Quasars
• Wavelength-resolved Reverberation Mapping of quasar CTSC30.10: Dissecting MgII and FeII emission regions
• SALT long-slit spectroscopy of HE 0435-4312: fast displacement in the Mg II emission line

Cited by in corpus (6)

• MUSE adaptive-optics spectroscopy confirms dual active galactic nuclei and strongly lensed systems at sub-arcsec separation
• TiDES: The 4MOST Time Domain Extragalactic Survey
• Effects of heterogeneous data sets and time-lag measurement techniques on cosmological parameter constraints from MgII and CIV reverberation-mapped quasar data
• UV Fe II emission model of HE 0413-4031 and its relation to broad-line time delays
• Unveiling the quasar main sequence: illuminating the complexity of active galactic nuclei and their evolution
• Quasar Main Sequence unfolded by 2.5D FRADO (Natural expression of Eddington ratio, black hole mass, and inclination)