Application of the FRADO model of BLR formation to the Seyfert galaxy NGC 5548 and the first step toward determining the Hubble constant
arXiv:2410.03597 · doi:10.1051/0004-6361/202452497
Abstract
The dynamical and geometric structures of the Broad Line Region (BLR), along with the origins of continuum time delays in active galaxies, remain topics of ongoing debate. In this study, we aim to reproduce the observed broadband spectrum, the H line delay, and the continuum time delays using our newly developed model for the source NGC 5548. We adopt the standard accretion disk model, with the option of an inner hot flow, and employ the lamp-post model to account for disk irradiation. Additionally, we model the BLR structure based on radiation pressure acting on dust. The model is parameterized by the black hole mass, (which is fixed), the accretion rate, the viewing angle, the height of the lamp-post, the cloud density, and the cloud covering factor. The resulting continuum time delays arise from a combination of disk reprocessing and the reprocessing of a fraction of radiation by the BLR. Our model reasonably reproduces the observed broad-band continuum, the H time delay, and the continuum inter-band time delays measured during the observational campaign. When the accretion rate is not constrained by the known distance to the source, our approach allows for a direct estimation of the distance. The resulting Hubble constant, = km s Mpc, represents a significant improvement over previously reported values derived from continuum time delays in the literature. This pilot study demonstrates that, with sufficient data coverage, it is possible to disentangle the time delays originating from the accretion disk and the BLR. This paves the way for effectively using inter-band continuum time delays as a method for determining the Hubble constant. Additionally, the findings provide strong support for the adopted model for the formation of the H line.
accepted for publication by A&A
References in corpus (54)
- DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
- Space Telescope and Optical Reverberation Mapping Project. II. Swift and HST Reverberation Mapping of the Accretion Disk of NGC 5548
- Testing thermal reprocessing in AGN accretion discs
- Reverberation mapping of Active Galactic Nuclei: from X-ray corona to dusty torus
- Space Telescope and Optical Reverberation Mapping Project. I. Ultraviolet Observations of the Seyfert 1 Galaxy NGC 5548 with the Cosmic Origins Spectrograph on Hubble Space Telescope
- Swift monitoring of NGC 5548: X-ray reprocessing and short term UV/optical variability
- Dust inflated accretion disc as the origin of the Broad Line Region in Active Galactic Nuclei
- Modeling reverberation mapping data I: improved geometric and dynamical models and comparison with cross-correlation results
- Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-Line Analysis for NGC 5548
- The Sloan Digital Sky Survey Reverberation Mapping Project: Estimating Masses of Black Holes in Quasars with Single-Epoch Spectroscopy
- Radiation spectra of warm and optically thick coronae in AGN
- Modeling the UV/optical continuum time-lags in AGN
- UV/optical disk thermal reverberation in AGN: an in-depth study with an analytic prescription for the time-lag spectra
- Space Telescope and Optical Reverberation Mapping Project. IX. Velocity-Delay Maps for Broad Emission Lines in NGC 5548
- A 5% measurement of the Hubble constant from Type II supernovae
- Failed radiatively Accelerated Dusty Outflow model of the Broad Line Region in Active Galactic Nuclei. I. Analytical solution
- Reverberation Mapping of the Broad-line Region in NGC 5548: Evidence for Radiation Pressure?
- A New Method for Measuring Extragalactic Distances
- Testing broad line region models with Reverberation Mapping
- AGN Continuum Reverberation Mapping Based on Zwicky Transient Facility Light Curves
- High metal content of highly accreting quasars
- Strong gravitational lensing and microlensing of supernovae
- Cosmography with Supernova Refsdal through time-delay cluster lensing: independent measurements of the Hubble constant and geometry of the Universe
- A measurement of the Hubble constant using galaxy redshift surveys
- The picture of BLR in 2.5-D FRADO: Dynamics & Geometry
- The CaFe Project: Optical Fe II and Near-Infrared Ca II triplet emission in active galaxies -- simulated EWs, the co-dependence of cloud sizes and metal content
- Spitzer Space Telescope Measurements of Dust Reverberation Lags in the Seyfert 1 Galaxy NGC 6418
- Supermassive Black Hole and Broad-line Region in NGC~5548: Results from Five-season Reverberation Mapping
- Standardizing reverberation-measured C IV time-lag quasars, and using them with standardized Mg II quasars to constrain cosmological parameters
- Revisiting UV/optical continuum time lags in AGN
- Radiation pressure on dust explains the Low Ionized Broad Emission Lines in Active Galactic Nuclei
- The CaFe Project: Optical Fe II and Near-Infrared Ca II triplet emission in active galaxies: (I) Photoionization modelling
- Modeling photometric reverberation mapping data for the next generation of big data surveys. Quasar accretion disks sizes with the LSST
- Spectroastrometry and Reverberation Mapping: the Mass and Geometric Distance of the Supermassive Black Hole in the Quasar 3C 273
- Dust-driven wind as a model of Broad Absorption Line quasars
- Tully-Fisher Distances and Dynamical Mass Constraints for 24 Host Galaxies of Reverberation-Mapped AGN
- TDCOSMO. XVI. Measurement of the Hubble Constant from the Lensed Quasar WGD20384008
- Modelling time delays from two reprocessors in active galactic nuclei
- Estimating reddening of the continuum and broad-line region of active galactic nuclei: the mean reddening of NGC 5548 and the size of the accretion disc
- Broadband X-ray/UV/optical time-resolved spectroscopy of NGC 5548: The origin of the UV/optical variability in active galactic nuclei
- Model-independent way to determine the Hubble constant and the curvature from phase shift of gravitational waves with DECIGO
- Broad He I 1.08 μm absorption from the obscurer in the active galaxy NGC 5548
- Broad-line region in active galactic nuclei: Dusty or dustless?
- Effects of heterogeneous data sets and time-lag measurement techniques on cosmological parameter constraints from MgII and CIV reverberation-mapped quasar data
- Quasars as standard candles VI: spectroscopic validation of the cosmological sample
- Viewing angle observations and effects of evolution with redshift, black hole mass, and Eddington ratio in quasar based cosmology
- UV Fe II emission model of HE 0413-4031 and its relation to broad-line time delays
- Are quasars reliable standard candles?
- Spectroastrometry and Reverberation Mapping of Active Galactic Nuclei. II. Measuring Geometric Distances and Black Hole Masses of Four Nearby Quasars
- Taming the derivative: diagnostics of the continuum and H emission in a prototypical Population B active galaxy
- Dispersion in the Hubble-Lemaître constant measurements from gravitational clustering
- H line shape and radius-luminosity relation in 2.5D FRADO
- Modeling the Reverberation Response of the Broad Line Region in Active Galactic Nuclei II: Incorporating Photoionization Models
- Reverberation Mapping Data of NGC 5548 Imply a Multicomponent Broad-Line Region