Multifrequency VLBI Observations of the Broad Absorption Line Quasar J1020+4320: Recently Restarted Jet Activity?

Abstract

This paper reports very-long-baseline interferometry observations of the radio-loud broad absorption line (BAL) quasar J1020+4320 at 1.7, 2.3, 6.7, and 8.4 GHz using the Japanese VLBI network (JVN) and European VLBI network (EVN). The radio morphology is compact with a size of ~10 pc. The convex radio spectrum is stable over the last decade; an observed peak frequency of 3.2 GHz is equivalent to 9.5 GHz in the rest frame, suggesting an age of the order of ~100 years as a radio source, according to an observed correlation between linear size and peak frequency of compact steep spectrum (CSS) and giga-hertz peaked spectrum (GPS) radio sources. A low-frequency radio excess suggests relic of past jet activity. J1020+4320 may be one of the quasars with recurrent and short-lived jet activity during a BAL-outflowing phase.

7 pages, 2 figures, 2 tables, accepted for publication in PASJ

References in corpus (15)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• A Catalog of Broad Absorption Line Quasars in Sloan Digital Sky Survey Data Release 5
• Fast outflows in compact radio sources: evidence for AGN-induced feedback in the early stages of radio source evolution
• The VLBA Imaging and Polarimetry Survey at 5 GHz
• The Intrinsic Fraction of Broad Absorption Line Quasars
• The Physical Nature of Polar Broad Absorption Line Quasars
• Radio spectra and polarisation properties of radio-loud Broad Absorption Line Quasars
• Evolutive Unification in Composite Active Galactic Nuclei
• Spectropolarimetry of PKS 0040-005 and the Orientation of Broad Absorption Line Quasars
• PKS B1545-321: Bow shocks of a relativistic jet?
• Multiwavelength study of Cygnus A II. X-ray inverse-Compton emission from a relic counterjet and implications for jet duty-cycles
• The Compact Structure of Radio-Loud Broad Absorption Line Quasars
• Quasi-simultaneous multi-frequency observations of inverted-spectrum GPS candidate sources
• FIRST-based survey of Compact Steep Spectrum sources, V. Milliarcsecond-scale morphology of CSS objects
• High Frequency Peakers: The Faint Sample

Cited by in corpus (6)

• The origin of radio emission in broad absorption line quasars: Results from the LOFAR Two-metre Sky Survey
• Short-Term Radio Variability and Parsec-Scale Structure in a Gamma-Ray Narrow-Line Seyfert 1 Galaxy 1H 0323+342
• VLBA Multi-frequency Polarimetric imaging of Radio-loud Broad Absorption Line Quasars
• A VLBI survey of compact Broad Absorption Lines (BAL) quasars with BALnicity Index BI=0
• Radio-Loud and Radio-Quiet BAL Quasars: A Detailed Ultraviolet Comparison
• A Giant Metrewave Radio Telescope Survey of Radio-loud Broad Absorption Line Quasars