The Extreme Red Excess in Blazar Ultraviolet Broad Emission Lines

Abstract

We present a study of quasars with very redward asymmetric (RA) ultraviolet (UV) broad emission lines (BELs). An excess of redshifted emission has been previously shown to occur in the BELs of radio loud quasars and is most extreme in certain blazars. Paradoxically, blazars are objects that are characterized by a highly relativistic blue-shifted outflow towards Earth. We show that the red emitting gas resides in a very broad component (VBC) that is typical of Population B quasars that are defined by a wide H$\beta$ BEL profile. Empirically, we find that RA BEL blazars have both low Eddington rates ($\lesssim 1\%$) and an inordinately large (order unity) ratio of long term time averaged jet power to accretion luminosity. The latter circumstance has been previously shown to be associated with a depressed extreme UV ionizing continuum. Both properties conspire to produce a low flux of ionizing photons, two orders of magnitude less than typical Population B quasars. We use CLOUDY models to demonstrate that a weak ionizing flux is required for gas near the central black hole to be optimally ionized to radiate BELs with high efficiency (most quasars over-ionize nearby gas, resulting in low radiative efficiency). The large gravitational redshift and transverse Doppler shift results in a VBC that is redshifted by $\sim 2000-5000$~km~s${}^{-1}$ with a correspondingly large line width. The RA BELs result from an enhanced efficiency (relative to typical Population B quasars) to produce a luminous, redshifted VBC near the central black hole.

To appear in ApJ

References in corpus (59)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei. II. A Homogeneous Analysis of a Large Reverberation-Mapping Database
• Determining Central Black Hole Masses in Distant Active Galaxies and Quasars. II. Improved Optical and UV Scaling Relationships
• Estimating Black Hole Masses in Active Galaxies Using the Halpha Emission Line
• Central Masses and Broad-Line Region Sizes of Active Galactic Nuclei: I. Comparing the Photoionization and Reverberation Techniques
• General physical properties of bright Fermi blazars
• The Rest-Frame Extreme Ultraviolet Spectral Properties of QSOs
• An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
• The Soft X-Ray Properties of a Complete Sample of Optically Selected Quasars II. Final Results
• The X-ray-to-Optical Properties of Optically-Selected Active Galaxies Over Wide Luminosity and Redshift Ranges
• The emission line - radio correlation for radio sources using the 7C Redshift Survey
• A Composite HST Spectrum of Quasars
• The XMM-Newton view of PG quasars I. X-ray continuum and absorption
• MOJAVE. X. Parsec-Scale Jet Orientation Variations and Superluminal Motion in AGN
• The Lick AGN Monitoring Project: Broad-Line Region Radii and Black Hole Masses from Reverberation Mapping of Hbeta
• Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei III. Kinematics of Parsec-Scale Radio Jets
• Kinematics of Parsec-Scale Jets of Gamma-Ray Blazars at 43~GHz within the VLBA-BU-BLAZAR Program
• Broad Emission Line Shifts in Quasars: An Orientation Measure for Radio-Quiet Quasars?
• The Radiative Efficiency of Accretion Flows in Individual AGN
• Comparing Single-Epoch Virial Black Hole Mass Estimators for Luminous Quasars
• The Lick AGN Monitoring Project: The MBH - sigma Relation For Reverberation-Mapped Active Galaxies
• Black Hole Growth to z = 2 - I: Improved Virial Methods for Measuring M_BH and L/L_Edd
• MOJAVE XIII. Parsec-Scale AGN Jet Kinematics Analysis Based on 19 years of VLBA Observations at 15 GHz
• An Atlas of Computed Equivalent Widths of Quasar Broad Emission Lines
• A Composite Extreme Ultraviolet QSO Spectrum from the Far Ultraviolet Spectroscopic Explorer
• The spectra and energies of classical double radio lobes
• Extended radio emission in MOJAVE Blazars: Challenges to Unification
• The Second INTEGRAL AGN Catalogue
• The Profiles of H-Beta and [OIII] 5007 in Radio-Loud Quasars
• HST-COS Observations of AGN. II. Extended Survey of Ultraviolet Composite Spectra from 159 Active Galactic Nuclei
• Line driven winds and the UV turnover in AGN accretion discs
• Are Seyfert Narrow Line Regions Powered by Radio Jets?
• The Connection Between Jets, Accretion Disks, and Black Hole Mass in Blazars
• Flare-like variability of the Mg IIλ2800Å emission line in the gamma-ray blazar 3C 454.3
• Orientation dependency of broad-line widths in quasars and consequences for black-hole mass estimation
• Is Mg II 2800 a Reliable Virial Broadening Estimator for Quasars?
• Geometry and inclination of the broad line region in blazars
• A 98% spectroscopically complete sample of the most powerful equatorial radio sources at 408 MHz
• Estimate black hole masses of AGNs using ultraviolet emission line properties
• The orientation dependence of quasar single-epoch black hole mass scaling relationships
• A peculiar multi-wavelength flare in the Blazar 3C 454.3
• The HST view of the broad line region in low luminosity AGN
• The Host Galaxy of 3C 279
• The Jet Power and Emission Line Correlations of Radio Loud Optically Selected Quasars
• The Optical and Ultraviolet Emission-Line Properties of Bright Quasars with Detailed Spectral Energy Distributions
• The Redshifted Excess in Quasar C IV Broad Emission Lines
• Probing the Inner Disk Emission of the Herbig Ae Stars HD 163296 and HD 190073
• Kinetically Dominated FRII Radio Sources
• PKS 0743$-$67: An Ultra-luminous Accretion Disk and a High Kinetic Luminosity Jet
• Model-dependent estimate on the connection between fast radio bursts and ultra-high energy cosmic rays
• Evidence of the Dynamics of Relativistic Jet Launching in Quasars
• Characterization of a sample of intermediate-type AGN. I. Spectroscopic properties and serendipitous discovery of new Dual AGN
• The Extreme Ultraviolet Deficit and Magnetically Arrested Accretion in Radio Loud Quasars
• The Extreme Ultraviolet Variability of Quasars
• Multi-Epoch Observations of the Redwing Excess in the Spectrum of 3C279
• The flat-spectrum radio quasar 3C 345 from the high to the low emission state
• The Detection of Diffuse Extended Structure in 3C~273: Implications for Jet Power
• Jets and QSO Spectra
• The Kinetically Dominated Quasar 3C~418

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• Extreme Variability Quasars in Their Various States. I: The sample selection and composite SDSS spectra
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• Kinematics of the H$\alpha$ and H$\beta$ broad line region in an SDSS sample of type 1 AGNs
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