Investigating the {Origin} of the Absorption-Line Variability in Narrow-Line Seyfert 1 Galaxy WPVS 007

Abstract

Broad Absorption Line Quasars (BALQs) are actively accreting supermassive black holes that have strong outflows characterized by broad absorption lines in their rest-UV spectra. Variability in these absorption lines occurs over months to years depending on the source. WPVS 007, a low-redshift, low-luminosity Narrow-line Seyfert 1 (NLS1) shows strong variability over shorter timescales, providing a unique opportunity to study the driving mechanism behind this variability that may mimic longer scale variability in much more massive quasars. We present the first variability study using {the} spectral synthesis code SimBAL, which provides velocity-resolved changes in physical conditions of the gas using constraints from multiple absorption lines. Overall, we find WPVS 007 to have a highly ionized outflow with a large mass-loss rate and kinetic luminosity. We determine the primary cause of the absorption-line variability in WPVS 007 to be a change in covering fraction of the continuum by the outflow. This study is the first SimBAL analysis where multiple epochs of observation were fit simultaneously, demonstrating the ability of SimBAL to use the time-domain as an additional constraint in spectral models.

arXiv comment26 pages, 3 tables, 11 figures

References in corpus (66)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• emcee: The MCMC Hammer
• Energy input from quasars regulates the growth and activity of black holes and their host galaxies
• The Swift X-ray Telescope
• The Swift Ultra-Violet/Optical Telescope
• Photometric Calibration of the Swift Ultraviolet/Optical Telescope
• Dynamics of line-driven disk winds in Active Galactic Nuclei
• Revisiting the Unified Model of Active Galactic Nuclei
• Quasar Feedback: More Bang for Your Buck
• Sherpa: a Mission-Independent Data Analysis Application
• The Frequency and Radio Properties of Broad Absorption Line Quasars
• Paper II: Calibration of the Swift ultraviolet/optical telescope
• The Quasar Outflow Contribution to AGN Feedback: VLT Measurements of SDSS J0318-0600
• Feedback from Mass Outflows in Nearby Active Galactic Nuclei I. UV and X-ray Absorbers
• Metallicities and Abundance Ratios from Quasar Broad Emission Lines
• Quasar Outflows and AGN Feedback in the Far UV: HST/COS Observations of QSO HE0238-1904
• Broad Absorption Line Variability on Multi-Year Timescales in a Large Quasar Sample
• Keck High Resolution Spectroscopy of PKS 0123+257: Intrinsic Absorption in a Radio Loud Quasar
• Quasar Broad Absorption Line Variability on Multi-Year Time Scales
• The First Swift Ultra-Violet/Optical Telescope GRB Afterglow Catalog
• Broad Absorption Line Disappearance on Multi-Year Timescales in a Large Quasar Sample
• High-Resolution Keck Spectra of the Associated Absorption Lines in 3C 191
• Major contributor to AGN feedback: VLT X-shooter observations of SIV BAL QSO outflows
• A High-Velocity Narrow Absorption Line Outflow in the Quasar J212329.46-005052.9
• The ROSAT All-Sky Survey Bright Source Catalogue
• Variability in Quasar Broad Absorption Line Outflows I. Trends in the Short-Term versus Long-Term Data
• Broad P V Absorption in the BALQSO, PG 1254+047: Column Densities, Ionizations and Metal Abundances in BAL Winds
• Broad Absorption Line Variability in Repeat Quasar Observations from the Sloan Digital Sky Survey
• What Determines the Depth of BALs? Keck HIRES Observations of BALQSO 1603+300
• X-ray/UV Campaign on the Mrk 279 AGN Outflow: Constraining Inhomogeneous Absorber Models
• Variability in quasar broad absorption line outflows II. Multi-epoch monitoring of SiIV and CIV BAL variability
• The Ionized Gas and Nuclear Environment in NGC 3783 V. Variability and Modeling of the Intrinsic Ultraviolet Absorption
• Variability in Quasar Broad Absorption Line Outflows III. What Happens on the Shortest Time-scales?
• Implications of Dramatic Broad Absorption Line Variability in the Quasar FBQS J1408+3054
• Extreme-Velocity Quasar Outflows and the Role of X-ray Shielding
• Emergence of a Broad-Absorption-Line Outflow in the Narrow-line Seyfert 1 Galaxy WPVS 007
• The Sloan Digital Sky Survey Reverberation Mapping Project: Rapid CIV Broad Absorption Line Variability
• The Evolution of Quasar CIV and SiIV Broad Absorption Lines Over Multi-Year Time Scales
• Evidence for Photoionization Driven Broad Absorption Line Variability
• BAL phosphorus abundance and evidence for immense ionic column densities in quasar outflows: VLT X-Shooter observations of quasar SDSS J1512+1119
• The Dependence of C IV Broad Absorption Line Properties on Accompanying Si IV and Al III Absorption: Relating Quasar-Wind Ionization Levels, Kinematics, and Column Densities
• Broad absorption line disappearance and emergence using multiple-epoch spectroscopy from the Sloan Digital Sky Survey
• The z=0.54 LoBAL Quasar SDSS J085053.12+445122.5: I. Spectral Synthesis Analysis Reveals a Massive Outflow
• Variability in Low Ionization Broad Absorption Line Outflows
• Dynamically evolving Mg II broad absorption line flow in SDSS J133356.02+001229.1
• A Variable PV Broad Absorption Line and Quasar Outflow Energetics
• Probing the time variability of five Fe low broad absorption line quasars
• First detection of hard X-ray photons in the soft X-ray transient Narrow-Line Seyfert 1 galaxy WPVS 007: The X-ray photon distribution observed by Swift
• The Sloan Digital Sky Survey Reverberation Mapping Project: Systematic Investigations of Short-Timescale CIV Broad Absorption Line Variability
• The Physical Properties of Low Redshift FeLoBAL Quasars. I. Spectral Synthesis Analysis of the BAL Outflows using $SimBAL$
• Variable Reddening and Broad Absorption Lines in the Narrow-line Seyfert 1 Galaxy WPVS 007: an Origin in the Torus
• Discovery of a Remarkably Powerful Broad Absorption Line Quasar Outflow in SDSS J135246.37+423923.5
• Emergence and Variability of Broad Absorption Line Quasar Outflows
• Emergence of a Quasar Outflow
• High-ionization emission line ratios from quasar broad line regions: metallicity or density?
• Constraining FeLoBAL outflows from absorption line variability
• Strong UV and X-ray variability of the Narrow Line Seyfert 1 Galaxy WPVS 007 -- on the nature of the X-ray low state
• An Update on the X-ray transient Narrow-Line Seyfert 1 galaxy WPVS 007: Swift observations of UV variability and persistence of X-ray faintness
• Ionization driven intrinsic absorption line variability of BAL quasars in the Stripe 82 region
• Transient C IV Broad Absorption Lines in radio detected QSOs
• The z=0.54 LoBAL Quasar SDSS J085053.12+445122.5: II. The Nature of Partial Covering in the Broad-Absorption-Line Outflow
• The Properties of Low-Redshift FeLoBAL Quasars: III. The Location and Geometry of the Outflows
• Rapidly varying Mg II broad absorption line in SDSS J133356.02+001229.1
• SDSS J1138+3517: A quasar showing remarkably variable broad absorption lines
• On the Origin of the Dramatic Spectral Variability of WPVS 007

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• Multi-phase black-hole feedback and a bright [CII] halo in a Lo-BAL quasar at $z\sim 6.6$
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