Unusual high-redshift radio BAL quasar 1624+3758

Abstract

We present observations of the most radio-luminous BAL quasar known, 1624+3758, at redshift z = 3.377. The quasar has several unusual properties: (1) The FeII UV191 1787-A emission line is very prominent. (2) The BAL trough (BALnicity index 2990 km/s) is detached by 21000 km/s and extends to velocity v = -29000 km/s. There are additional intrinsic absorbers at -1900 and -2800 km/s. (3) The radio rotation measure of the quasar, 18350 rad/m^2, is the second-highest known. The radio luminosity is P(1.4GHz) = 4.3 x 10^27 W/Hz (H0 = 50 km/s/Mpc, q0 = 0.5), radio loudness R* = 260. The radio source is compact (<~ 2.8 kpc) and the radio spectrum is GHz-peaked, consistent with it being relatively young. The width of the CIV emission line, in conjunction with the total optical luminosity, implies black-hole mass ~ 10^9 M(sun), L/L(Eddington) ~ 2. The high Eddington ratio, and the radio-loudness, place this quasar in one corner of Boroson's (2002) 2-component scheme for the classification of AGN, implying a very high accretion rate, and this may account for some of the unusual observed properties. A complex mini-BAL absorber at v = -3000 km/s is detected in each of CIV, NV and OVI. The blue and red components of the CIV doublet happen to be unblended, allowing both the covering factor and optical depth to be determined as a function of velocity. Variation of covering factor with velocity dominates the form of the mini-BAL...

arXiv comment18 pages, 14 figures, accepted for publication in MNRAS

References in corpus (49)

• The Sloan Digital Sky Survey: Technical Summary
• Reverberation Measurements for 17 Quasars and the Size-Mass-Luminosity Relations in Active Galactic Nuclei
• Composite Quasar Spectra From the Sloan Digital Sky Survey
• A Structure for Quasars
• The Third Data Release of the Sloan Digital Sky Survey
• The obscured growth of massive black holes
• An Empirical Ultraviolet Template for Iron Emission in Quasars as Derived from I Zw 1
• Black Hole Mass and Eddington Ratio as Drivers for the Observable Properties of Radio-Loud and Radio-Quiet QSOs
• The nature and origin of Seyfert warm absorbers
• Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey
• Broad Emission Line Shifts in Quasars: An Orientation Measure for Radio-Quiet Quasars?
• The Frequency and Radio Properties of Broad Absorption Line Quasars
• Properties of Radio-Selected Broad Absorption-Line Quasars from the FIRST Survey
• Continuum and Emission-Line Properties of Broad Absorption Line Quasars
• The radio-luminosity - black hole mass correlation for quasars from the FIRST Bright Quasar Survey, and a ``unification scheme'' for radio-loud and radio-quiet quasars
• Keck High Resolution Spectroscopy of PKS 0123+257: Intrinsic Absorption in a Radio Loud Quasar
• Keck Hires Observations of the QSO First J104459.6+365605: Evidence for a Large Scale Outflow
• Conference Summary: AGN Physics with the Sloan Digital Sky Survey
• A View through Faraday's Fog 2: Parsec Scale Rotation Measures in 40 AGN
• HST STIS Observations of PG 0946+301: the Highest Quality UV Spectrum of a BALQSO
• A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Early Data Release
• Metal Abundances and Ionization in QSO Intrinsic Absorbers
• Active Galactic Nuclei Emission-Line Properties Versus Eddington Ratio
• What Determines the Depth of BALs? Keck HIRES Observations of BALQSO 1603+300
• The FIRST Bright Quasar Survey III. The South Galactic Cap
• On the Column Density of AGN Outflows: the Case of NGC 5548
• Discovery of Radio-loud Broad Absorption Line Quasars Using Ultraviolet Excess and Deep Radio Selection
• Broad Absorption Line Quasars in the Early Data Release from the Sloan Digital Sky Survey
• Broad Absorption Line Quasars in the Sloan Digital Sky Survey with VLA-FIRST Radio Detections
• Extreme gas properties in the most distant quasars
• Variability of Narrow, Associated Absorption Lines in Moderate- and Low-Redshift Quasars
• Discovery of a Classic FR-II Broad Absorption Line Quasar from the FIRST Survey
• The sub-millimeter properties of broad absorption line quasars
• Polarization properties of broad absorption line QSOs : new statistical clues
• The HST Quasar Absorption Line Key Project XII. The Unusual Absorption Line System in the Spectrum of PG 2302+029 ---Ejected or Intervening?
• Chemical abundances in quasar host galaxies and environments from narrow absorption line systems
• A near-solar metallicity damped Lyman-alpha system toward the BAL quasar Tol 1037-2703
• A collimated flow driven by radiative pressure from the nucleus of quasar Q~1511+091
• VLT+UVES Spectroscopy of the CaII LoBAL Quasar SDSS J030000.56+004828.0
• An Intrinsic Absorption Complex Toward RXJ1230.8+0115: Geometry and Photoionization Conditions
• An Unusual Mini-BAL Quasar at z=4.59
• Submillimetre observations of a sample of broad absorption line quasars
• The Twice-Overlooked, Second FR II Broad Absorption Line Quasar LBQS 1138-0126
• Multi-Frequency Study of the B3-VLA Sample II. The Database
• FIRST 0747+2739: A FIRST/2MASS Quasar with an Overabundance of C IV Absorption Systems
• High-redshift QSOs in the FIRST survey
• VLT + UVES Spectroscopy of the Low-Ionization Intrinsic Absorber in SDSS J001130.56+005550.7
• A sample of radio-loud QSOs at redshift ~ 4
• Outflowing material in the zem = 4.92 BAL QSO SDSS~J160501.21-011220.0

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• An extreme rotation measure in the high-redshift radio galaxy PKS B0529-549
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• Deep Extragalactic VLBI-Optical Survey (DEVOS) II. Efficient VLBI detection of SDSS quasars
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