Direction of Parsec-Scales Jets for 9220 Active Galactic Nuclei

Abstract

The direction of parsec-scale jets in active galactic nuclei (AGNs) is essential information for many astrophysical and astrometric studies, including linear polarization and magnetic field structure, frequency-dependent synchrotron opacity, proper motion, and reference frame alignment. We developed a rigorous, simple, and completely automated method to measure the directions from calibrated interferometric visibility data at frequencies ranging from 1.4 GHz to 86 GHz. We publish the results for 9220 AGNs with the typical accuracy below 10 degrees. An internal check of the method comparing the directions between different observing frequencies as well as with previous publications verifies the robustness of the measured values.

11 pages, 10 figures, 2 tables; machine-readable tables available as ancillary files; accepted to ApJS

References in corpus (21)

• PolyChord: nested sampling for cosmology
• Kinematics of Parsec-Scale Jets of Gamma-Ray Blazars at 43~GHz within the VLBA-BU-BLAZAR Program
• The third realization of the International Celestial Reference Frame by very long baseline interferometry
• MOJAVE: XV. VLBA 15 GHz Total Intensity and Polarization Maps of 437 Parsec-Scale AGN Jets From 1996-2017
• MOJAVE. XVII. Jet Kinematics and Parent Population Properties of Relativistically Beamed Radio-Loud Blazars
• The VLBA Imaging and Polarimetry Survey at 5 GHz
• Relativistic Beaming and the Intrinsic Properties of Extragalactic Radio Jets
• Opacity in compact extragalactic radio sources and its effect on astrophysical and astrometric studies
• A Global 86GHz VLBI Survey of Compact Radio Sources
• The Sixth VLBA Calibrator Survey: VCS6
• The Fifth VLBA Calibrator Survey: VCS5
• MOJAVE: Monitoring of Jets in Active Galactic Nuclei with VLBA Experiments. XI. Spectral distributions
• Intrinsic Brightness Temperatures of AGN Jets
• VLBI measurement of the secular aberration drift
• VLBI-Gaia offsets favor parsec-scale jet direction in Active Galactic Nuclei
• Superluminal non-ballistic jet swing in the quasar NRAO 150 revealed by mm-VLBI
• Precise radio astrometry and new developments for the next generation of instruments
• The LBA Calibrator Survey of southern compact extragalactic radio sources - LCS1
• New Associations of Gamma-Ray Sources from the Fermi Second Source Catalog
• Doppler Boosting, Superluminal Motion, and the Kinematics of AGN Jets
• Evidence of the $Gaia$--VLBI position differences being related to radio source structure

Cited by in corpus (11)

• The Radio Fundamental Catalogue. I. Astrometry
• Properties of the jet in M87 revealed by its helical structure imaged with the VLBA at 8 and 15 GHz
• Tracing Milky Way scattering by compact extragalactic radio sources
• High-redshift quasars at $z\ge 3$: radio variability and MPS/GPS candidates
• Dynamic and Radiative Implications of Jet-Star Interactions in AGN Jets
• Parsec-scale jet direction evolution in AGNs
• Detection of an orthogonal alignment between parsec scale AGN jets and their host galaxies
• Dim cores of radio-bright AGN jets: VLBI and Gaia astrometry pinpoint different parsec-scale features
• The Relationship Between Emission Line and Continuum Luminosity and the Baldwin Effect in Blazars. I. The Case of the Mg II λ2798 Å Emission Line
• Direct VLBI Detection of Interstellar Turbulence Imprint on a Quasar: TXS 2005+403
• Revisiting the angular size-redshift cosmological test with milliarcsecond radio structures in active galactic nuclei