Long-term monitoring of the broad-line region properties in a selected sample of AGN

Abstract

We present the results of the long-term optical monitoring campaign of active galactic nuclei (AGN) coordinated by the Special Astrophysical Observatory of the Russian Academy of Science. This campaign has produced a remarkable set of optical spectra, since we have monitored for several decades different types of broad-line (type 1) AGN, from a Seyfert 1, double-peaked line, radio loud and radio quiet AGN, to a supermassive binary black hole candidate. Our analysis of the properties of the broad line region (BLR) of these objects is based on the variability of the broad emission lines. We hereby give a comparative review of the variability properties of the broad emission lines and the BLR of seven different type 1 AGNs, emphasizing some important results, such as the variability rate, the BLR geometry, and the presence of the intrinsic Baldwin effect. We are discussing the difference and similarity in the continuum and emission line variability, focusing on what is the impact of our results to the supermassive black hole mass determination from the BLR properties.

arXiv commentPublished in Frontiers in Astronomy and Space Science

References in corpus (25)

• A Cosmology Calculator for the World Wide Web
• The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
• Supermassive Black Holes in Active Galactic Nuclei. II. Calibration of the M-sigma Relationship for AGNs
• The Radius-Luminosity Relationship for Active Galactic Nuclei: The Effect of Host-Galaxy Starlight on Luminosity Measurements
• Analysis of optical Fe II emission in a sample of AGN spectra
• Contribution of the Disk Emission to the Broad Emission Lines in AGNs: Two-component model
• Spectroscopic Indication for a Centi-parsec Supermassive Black Hole Binary in the Galactic Center of NGC 5548
• The First Spectroscopically Resolved Sub-parsec Orbit of a Supermassive Binary Black Hole
• Spectral Optical Monitoring of the Narrow Line Seyfert 1 galaxy Ark 564
• Long-term variability of the optical spectra of NGC 4151: II. Evolution of the broad Ha and Hb emission-line profiles
• Evidence for periodicity in 43 year-long monitoring of NGC 5548
• Long-term variability of the optical spectra of NGC 4151: I. Light curves and flux correlations
• Profile variability of the H-alpha and H-beta broad emission lines in NGC5548
• Intermediate resolution H-beta spectroscopy and photometric monitoring of 3C 390.3 I. Further evidence of a nuclear accretion disk
• Spectropolarimetric evidence for a kicked supermassive black hole in the Quasar E1821+643
• Spectral optical monitoring of 3C390.3 in 1995-2007: I. Light curves and flux variation of the continuum and broad lines
• Variability of the H-beta line profiles as an indicator of orbiting bright spots in accretion disks of quasars: a case study of 3C 390.3
• Spectral optical monitoring of the double peaked emission line AGN Arp 102B: II. Variability of the broad line properties
• Spectral optical monitoring of 3C 390.3 in 1995-2007: II. Variability of the spectral line parameters
• First long-term optical spectro-photometric monitoring of a binary black hole candidate E1821+643: I. Variability of spectral lines and continuum
• The intrinsic Baldwin effect in broad Balmer lines of six long-term monitored AGNs
• Time Series Analysis of Active Galactic Nuclei: The case of Arp 102B, 3C 390.3, NGC 5548 and NGC 4051
• Long-term optical spectral monitoring of NGC 7469
• Periodicity in the continua and broad line curves of a quasar E1821+643
• Line shape variability in a sample of AGN with broad lines

Cited by in corpus (14)

• The Radius-Luminosity Relationship Depends on Optical Spectra in Active Galactic Nuclei
• The Sloan Digital Sky Survey Reverberation Mapping Project: Estimating Masses of Black Holes in Quasars with Single-Epoch Spectroscopy
• Black Hole Spin and Accretion Disk Magnetic Field Strength Estimates for more than 750 AGN and Multiple GBH
• Oscillatory patterns in the light curves of 5 long-term monitored type 1 AGN
• The luminosity-dependent contribution from the broad line region to the wavelength-dependent lags in Mrk 110
• Reading the tea leaves in the $M_{\mathrm{bh}}$-$M_{\ast ,\mathrm{sph}}$ and $M_{\mathrm{bh}}$-$R_{\mathrm{e},\mathrm{sph}}$ diagrams: dry and gaseous mergers with remnant angular momentum
• Variability and the size-luminosity relation of the intermediate mass AGN in NGC 4395
• Fantastic Fits with fantasy of Active Galactic Nuclei Spectra -- Exploring the Fe II emission near the H$\alpha$ line
• Estimating supermassive black hole masses in AGNs using polarization of broad MgII, H$\alpha$ and H$\beta$ 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
• Exploring possible relations between optical variability time scales and broad emission line shapes in AGN
• An optical perspective on early-stage AGN with extreme radio flares
• Chemical enrichment in LINERs from MaNGA. I. Tracing Oxygen and Nitrogen Nuclear Abundances in LINERs with Varied Ionizing Sources