Parameters of the Link between the Optical and Radio Frames from Gaia DR2 Data and VLBI Measurements

Abstract

Based on published data, we have assembled a sample of 88 radio stars for which there are both trigonometric parallax and proper motion measurements in the Gaia DR2 catalogue and VLBI measurements. A new estimate of the systematic offset between the optical and radio frames has been obtained by analyzing the GaiaDR2-VLBI trigonometric parallax differences: $\Delta \pi =-0.038\pm 0.046$ mas (with a dispersion of 0.156 mas). This means that the Gaia DR2 parallaxes should be increased by this correction. The parallax scale factor is shown to be always very close to unity within $\sim$3 kpc of the Sun: $b=1.002\pm \mathrm{0.007.}$ Our analysis of the proper motion differences for the radio stars based on the model of solid-body mutual rotation has revealed no rotation components differing significantly from zero: $({\omega }_x,{\omega }_y,{\omega }_z)=(-0.14,0.03,-0.33)\pm (0.15,0.22,0.16)$ mas yr${}^{-1}.$

arXiv comment14 pages, 3 figures, 1 table

References in corpus (49)

• The Gaia mission
• Validation of the new Hipparcos reduction
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• A 2.4% Determination of the Local Value of the Hubble Constant
• Gaia Data Release 2: The astrometric solution
• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant
• Evidence for a systematic offset of -80 micro-arcseconds in the Gaia DR2 parallaxes
• The APOGEE-2 Survey of the Orion Star Forming Complex II: Six-dimensional structure
• Asteroseismology and Gaia: Testing Scaling Relations Using 2200 Kepler Stars with TGAS Parallaxes
• Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333
• The Gould's Belt Distances Survey (GOBELINS) II. Distances and structure towards the Orion Molecular Clouds
• The Trigonometric Parallax of Cygnus X-1
• The first accurate parallax distance to a black hole
• VLBA determination of the distance to nearby star-forming regions I. The distance to T Tauri with 0.4% accuracy
• The Gould's Belt Distances Survey (GOBELINS) I. Trigonometric parallax distances and depth of the Ophiuchus complex
• Trigonometric Parallaxes of 6.7 GHz Methanol Masers
• A VLBI Resolution of the Pleiades Distance Controversy
• The Gould's Belt Distances Survey (GOBELINS). IV. Distance, Depth and Kinematics of the Taurus Star-Forming Region
• The Gould's Belt Distances Survey (GOBELINS) III. The distance to the Serpens/Aquila Molecular Complex
• Astrometric accuracy of phase-referenced observations with the VLBA and EVN
• VLBA determination of the distance to nearby star-forming regions V. Dynamical mass, distance and radio structure of V773 Tau A
• VLBI astrometry of circumstellar OH masers; proper motions and parallaxes of four AGB stars
• On significance of VLBI/Gaia position offsets
• Distance and Proper Motion Measurement of the Red Supergiant, S Persei, with VLBI H2O Maser Astrometry
• The Gould Belt Very Large Array Survey IV: The Taurus-Auriga complex
• An accurate geometric distance to the compact binary SS Cygni vindicates accretion disc theory
• A test of Gaia Data Release 1 parallaxes: implications for the local distance scale
• Improved VLBI astrometry of OH maser stars
• VLBI Astrometry of AGB Variables with VERA -- A Semiregular Variable S Crateris --
• The Distance and Size of the Red Hypergiant NML Cyg from VLBA and VLA Astrometry
• Accurate Parallax Measurement toward the Symbiotic Star R Aquarii
• Internal and relative motions of the Taurus and Ophiuchus star-forming regions
• Multi-Epoch VLBA Observations of the Compact Wind-Collision Region in the Quadruple System Cyg OB2 #5
• Distance and Proper Motion Measurement of the Red Supergiant, PZ Cas, in Very Long Baseline Interferometry H2O Maser Astrometry
• Distance Dependent Offsets between Parallaxes for Nearby Stars and Gaia DR1 Parallaxes
• Annual Parallax Distance to the K-type star system IRAS 22480+6002 measured with VERA
• VLBI Astrometry of the Semiregular Variable RX Bootis
• Measurement of the Distance and Proper Motions of the H2O Masers in the Young Planetary Nebula K 3-35
• VLBI Astrometry of AGB Variables with VERA -- A Mira Type Variable T Lepus
• VLBI for Gravity Probe B. V. Proper Motion and Parallax of the Guide Star, IM Pegasi
• The Parallax of the Red Hypergiant VX Sgr with Accurate Tropospheric Delay Calibration
• VLBI Observations of H2O Maser Annual Parallax and Proper Motion in IRAS 20143+3634: Reflection on the Galactic Constants
• Testing stellar proper motions of the TGAS using data of the HSOY, UCAC5 and PMA catalogues
• Another look at AM Herculis $-$ radio-astrometric campaign with the e-EVN at 6 cm
• Testing the distance scale of the Gaia TGAS catalogue by kinematic method
• Residual HCRF Rotation relative to the Inertial Coordinate System
• Radio Astrometry Of The Close Active Binary HR5110
• Overall properties of the Gaia DR1 reference frame

Cited by in corpus (7)

• Untangling the Galaxy. II. Structure within 3 kpc
• Kinematics of the Galaxy from a Sample of Young Open Star Clusters with Data from the Gaia DR2 Catalogue
• Galactic Rotation Based on OB Stars from the Gaia DR2 Catalogue
• Comet C/2018 V1 (Machholz-Fujikawa-Iwamoto): dislodged from the Oort Cloud or coming from interstellar space?
• Link between the Optical and Radio Frames from Gaia DR3 Data and VLBI Measurements
• VLBI astrometry on the white dwarf pulsar AR Scorpii
• Validation of the Gaia Early Data Release 3 parallax zero-point model with asteroseismology