Superluminal Motion and Jet Parameters in the Gamma-ray-Emitting Narrow-Line Seyfert 1 Galaxy TXS 1206+549

Abstract

Narrow-line Seyfert 1 (NLS1) galaxies are a peculiar subclass of active galactic nuclei (AGN). Among them, TXS 1206+549 belongs to a small group of radio-loud and gamma-ray-emitting NLS1 galaxies. We focus on the radio properties of this galaxy by analysing archival, high-resolution, very long baseline interferometry (VLBI) imaging observations taken at 8 GHz frequency in six epochs between 1994 and 2018. Using the milliarcsecond-scale radio structure, we can resolve a core and a jet component whose angular separation increases by (0.055 +/- 0.006) mas/yr. This corresponds to an apparent superluminal jet component motion of (3.5 +/- 0.4) c. From the core brightness temperature and the jet component proper motion, we determine the characteristic Doppler-boosting factor, the bulk Lorentz factor, and the jet viewing angle. We find no compelling evidence for a very closely aligned blazar-type jet. The parameters for TXS 1206+549 resemble those of radio-loud quasar jets with a moderate Lorentz factor (Gamma~4) and theta~24 deg inclination to the line of sight.

arXiv comment14 pages, 2 tables, 2 figures, accepted for publication in Galaxies

References in corpus (54)

• Unified Schemes for Radio-Loud Active Galactic Nuclei
• Fermi Large Area Telescope Fourth Source Catalog
• A Cosmology Calculator for the World Wide Web
• Relativistic Jets in Active Galactic Nuclei
• The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release
• Blazars in the Fermi Era: The OVRO 40-m Telescope Monitoring Program
• Black Hole Spin and the Radio Loud/Quiet Dichotomy of Active Galactic Nuclei
• Black Hole Mass and Eddington Ratio as Drivers for the Observable Properties of Radio-Loud and Radio-Quiet QSOs
• Roma-BZCAT: A multifrequency catalogue of Blazars
• Sub-milliarcsecond Imaging of Quasars and Active Galactic Nuclei. IV. Fine Scale Structure
• The 5th edition of the Roma-BZCAT. A short presentation
• Radio-loud Narrow-Line Type 1 Quasars
• Radio-Loud Narrow-Line Seyfert 1 as a New Class of Gamma-Ray AGN
• The VLBA Calibrator Survey - VCS1
• The third realization of the International Celestial Reference Frame by very long baseline interferometry
• The Sloan Digital Sky Survey Quasar Catalog III. Third Data Release
• On Black Hole Masses and Radio Loudness in AGN
• Most Supermassive Black Holes must be Rapidly Rotating
• MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-Loud Blazars
• The VLBA Imaging and Polarimetry Survey at 5 GHz
• The Dynamic Evolution of Young Extragalactic Radio Sources
• Fermi/LAT discovery of gamma-ray emission from a relativistic jet in the narrow-line quasar PMN J0948+0022
• A Global 86GHz VLBI Survey of Compact Radio Sources
• Properties of flat-spectrum radio-loud Narrow-Line Seyfert 1 Galaxies
• Constraining the limiting brightness temperature and Doppler factors for the largest sample of radio bright blazars
• On the two main classes of Active Galactic Nuclei
• Intrinsic Brightness Temperatures of AGN Jets
• MOJAVE XIX: Brightness Temperatures and Intrinsic Properties of Blazar Jets
• On the jet properties of the gamma-ray loud active galactic nuclei
• Connecting radio variability to the characteristics of gamma-ray blazars
• A spinning supermassive black hole binary model consistent with VLBI observations of the S5 1928+738 jet
• Blazar candidates beyond redshift 4 observed by Swift
• Compact steep-spectrum sources as the parent population of flat-spectrum radio-loud NLS1s
• Contemporaneous VLBA 5 GHz Observations of LAT-Detected Blazars
• The Blazar sequence and its Physical Understanding
• Investigating powerful jets in radio-loud Narrow Line Seyfert 1s
• The physical properties of $Fermi$-4LAC flat spectrum radio quasars
• Statistical multifrequency study of narrow-line Seyfert 1 galaxies
• Radio Weak BL Lac objects in the Fermi era
• The relativistic jet and its central engine of $Fermi$ blazars
• Rare finding of a 100 kpc large double-lobed radio galaxy hosted in the Narrow Line Seyfert 1 galaxy SDSS J103024.95+551622.7
• X-ray Intraday Variability of the TeV Blazar PKS 2155-304 with Suzaku During 2005-2014
• SDSS J094635.06+101706.1: a redshift one, very radio-loud, γ-ray emitting narrow-line Seyfert 1 galaxy
• Gamma-ray Emitting Narrow-Line Seyfert 1 Galaxies: Past, Present, and Future
• FERMI transient J1544-0649: a flaring radio-weak BL Lac
• Big and young supermassive black holes in the early Universe
• Radio jet structures at ~100 parsec and larger scales of the $\gamma$-ray-emitting narrow-line Seyfert 1 galaxy PMN J0948+0022
• TXS 1206+549: a new $\gamma$-ray detected narrow-line Seyfert 1 galaxy at redshift 1.34?
• Further evidences of superluminal AGNs as $\gamma$-ray sources
• Reconciling inverse-Compton Doppler factors with variability Doppler factors in blazar jets
• The Highly Self-Absorbed Blazar, PKS\,1351$-$018
• The loud and the quiet: searching for radio counterparts of two radio-weak BL Lac candidates with VLBI
• The radio structure of the $\gamma$-ray narrow-line Seyfert 1 galaxy SDSS J211852.96$-$073227.5
• The rare extended radio-loud narrow-line Seyfert 1 galaxy SDSS J1030+5516 at high resolution

Cited by in corpus (2)

• Solid Identification of Extragalactic Gamma-Ray Source Using High-Resolution Radio Interferometric Observation
• What is Inside the Double-Double Structure of the Radio Galaxy J0028+0035?