Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes

Abstract

Gaia Data Release 1 (Gaia DR1) contains astrometric results for more than 1 billion stars brighter than magnitude 20.7 based on observations collected by the Gaia satellite during the first 14 months of its operational phase. We give a brief overview of the astrometric content of the data release and of the model assumptions, data processing, and validation of the results. For stars in common with the Hipparcos and Tycho-2 catalogues, complete astrometric single-star solutions are obtained by incorporating positional information from the earlier catalogues. For other stars only their positions are obtained by neglecting their proper motions and parallaxes. The results are validated by an analysis of the residuals, through special validation runs, and by comparison with external data. Results. For about two million of the brighter stars (down to magnitude ~11.5) we obtain positions, parallaxes, and proper motions to Hipparcos-type precision or better. For these stars, systematic errors depending e.g. on position and colour are at a level of 0.3 milliarcsecond (mas). For the remaining stars we obtain positions at epoch J2015.0 accurate to ~10 mas. Positions and proper motions are given in a reference frame that is aligned with the International Celestial Reference Frame (ICRF) to better than 0.1 mas at epoch J2015.0, and non-rotating with respect to ICRF to within 0.03 mas/yr. The Hipparcos reference frame is found to rotate with respect to the Gaia DR1 frame at a rate of 0.24 mas/yr. Based on less than a quarter of the nominal mission length and on very provisional and incomplete calibrations, the quality and completeness of the astrometric data in Gaia DR1 are far from what is expected for the final mission products. The results nevertheless represent a huge improvement in the available fundamental stellar data and practical definition of the optical reference frame.

arXiv commentAccepted for publication in Astronomy & Astrophysics

References in corpus (31)

• The Sloan Digital Sky Survey: Technical Summary
• The Gaia mission
• Validation of the new Hipparcos reduction
• The SIMBAD astronomical database
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The u'g'r'i'z' Standard Star Network
• The IAU 2000 resolutions for astrometry, celestial mechanics and metrology in the relativistic framework: explanatory supplement
• New Period-Luminosity and Period-Color Relations of Classical Cepheids: I. Cepheids in the Galaxy
• The astrometric core solution for the Gaia mission. Overview of models, algorithms and software implementation
• A new calibration of Galactic Cepheid Period-Luminosity relations from B to K bands, and a comparison to LMC PL relations
• The Trigonometric Parallax of Cygnus X-1
• VLBA determination of the distance to nearby star-forming regions I. The distance to T Tauri with 0.4% accuracy
• A VLBI Resolution of the Pleiades Distance Controversy
• Gaia Data Release 1, Pre-processing and source list creation
• VLBA determination of the distance to nearby star-forming regions V. Dynamical mass, distance and radio structure of V773 Tau A
• Distance and Proper Motion Measurement of the Red Supergiant, S Persei, with VLBI H2O Maser Astrometry
• Radial velocities for the Hipparcos-Gaia Hundred-Thousand-Proper-Motion project
• Radio Astrometry Of The Triple Systems Algol And UX Arietis
• Physically adequate proper reference system of a test observer and relativistic description of the GAIA attitude
• The Large Quasar Reference Frame (LQRF) - an optical representation of the ICRS
• Joint astrometric solution of Hipparcos and Gaia: A recipe for the Hundred Thousand Proper Motions project
• Rigorous treatment of barycentric stellar motion: Perspective and light-time effects in astrometric and radial velocity data
• Accurate stellar masses in the multiple system T Tau
• Distance and Proper Motion Measurement of the Red Supergiant, PZ Cas, in Very Long Baseline Interferometry H2O Maser Astrometry
• Gaia astrometry for stars with too few observations - a Bayesian approach
• VLBI for Gravity Probe B: The Guide Star IM Pegasi
• VLBI Astrometry of AGB Variables with VERA -- A Mira Type Variable T Lepus
• Chromaticity in all-reflective telescopes for astrometry
• Quasars can be used to verify the parallax zero-point of the Tycho-Gaia Astrometric Solution
• Implementing the Gaia Astrometric Global Iterative Solution (AGIS) in Java
• A conjugate gradient algorithm for the astrometric core solution of Gaia

Cited by in corpus (468)

• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• Gaia Data Release 2: The astrometric solution
• Challenges for $\Lambda$CDM: An update
• Gaia Data Release 2: using Gaia parallaxes
• Gaia Data Release 2: Kinematics of globular clusters and dwarf galaxies around the Milky Way
• Measurements of the Hubble Constant: Tensions in Perspective
• New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant
• The California Kepler Survey VII. Precise Planet Radii Leveraging Gaia DR2 Reveal the Stellar Mass Dependence of the Planet Radius Gap
• Gaia Data Release 2: Mapping the Milky Way disc kinematics
• Streams, substructures and the early history of the Milky Way
• Gaia Data Release 1: Catalogue validation
• The GALAH Survey: Second Data Release
• Kinematics in Young Star Clusters and Associations with Gaia DR2
• Pan-STARRS Photometric and Astrometric Calibration
• Precision Stellar Characterization of FGKM Stars using an Empirical Spectral Library
• The third realization of the International Celestial Reference Frame by very long baseline interferometry
• The Hipparcos-Gaia Catalog of Accelerations: Gaia EDR3 Edition
• The origin of accreted stellar halo populations in the Milky Way using APOGEE, $\text{Gaia}$, and the EAGLE simulations
• Asteroseismology and Gaia: Testing Scaling Relations Using 2200 Kepler Stars with TGAS Parallaxes
• The Hipparcos-Gaia Catalog of Accelerations
• The GALAH Survey: Observational Overview and Gaia DR1 companion
• Hunting for open clusters in \textit{Gaia} DR2: $582$ new OCs in the Galactic disc
• The anatomy of the Orion B Giant Molecular Cloud: A local template for studies of nearby galaxies
• Gaia reveals a metal-rich in-situ component of the local stellar halo
• Individual Dynamical Masses of Ultracool Dwarfs
• A new method for unveiling Open Clusters in Gaia: new nearby Open Clusters confirmed by DR2
• Galactic Archaeology with asteroseismic ages: evidence for delayed gas infall in the formation of the Milky Way disc
• Gaia Data Release 2: The Celestial reference frame (Gaia-CRF2)
• The age-metallicity structure of the Milky Way disk
• The California-Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars
• The Hubble Constant from Infrared Surface Brightness Fluctuation Distances
• Confirmation of the $Gaia$ DR2 parallax zero-point offset using asteroseismology and spectroscopy in the $Kepler$ field
• The influence of atomic diffusion on stellar ages and chemical tagging
• Structure of Herbig AeBe disks at the milliarcsecond scale A statistical survey in the H band using PIONIER-VLTI
• The Sixth Data Release of the Radial Velocity Experiment (RAVE) -- I: Survey Description, Spectra and Radial Velocities
• Gaia Data Release 2: processing of the photometric data
• The CARMENES search for exoplanets around M dwarfs. First visual-channel radial-velocity measurements and orbital parameter updates of seven M-dwarf planetary systems
• Comoving stars in Gaia DR1: An abundance of very wide separation co-moving pairs
• UCAC5: New Proper Motions using Gaia DR1
• Structure and kinematics of the Taurus star-forming region from Gaia-DR2 and VLBI astrometry
• Ages and kinematics of chemically selected, accreted Milky Way halo stars
• RR Lyrae stars as standard candles in the Gaia Data Release 2 Era
• The State-of-the-Art HST Astro-Photometric Analysis of the core of $\omega$ Centauri. I. The Catalog
• The Kinematics of the Scorpius-Centaurus OB Association from Gaia DR1
• Potential Kick Velocity distribution of black hole X-ray binaries and implications for natal kicks
• Estimating distances from parallaxes. III. Distances of two million stars in the Gaia DR1 catalogue
• Stellar Inventory of the Solar Neighborhood using Gaia DR1
• The TESS-HERMES survey Data Release 1: high-resolution spectroscopy of the TESS southern continuous viewing zone
• The origin of the Gaia phase-plane spiral
• Hunting for open clusters in \textit{Gaia} DR2: the Galactic anticentre
• Gaia Photometric Science Alerts
• The Gould's Belt Distances Survey (GOBELINS). IV. Distance, Depth and Kinematics of the Taurus Star-Forming Region
• Photometry and Proper Motions of M, L, and T Dwarfs from the Pan-STARRS1 3$\pi$ Survey
• Warp, Waves, and Wrinkles in the Milky Way
• The Correlation Between Mixing Length and Metallicity on the Giant Branch: Implications for Ages in the Gaia Era
• The Yale-Potsdam Stellar Isochrones (YaPSI)
• The Galactic WC and WO stars: The impact of revised distances from Gaia DR2 and their role as massive black hole progenitors
• Galactic rotation in Gaia DR1
• The first view of $\delta$ Scuti and $\gamma$ Doradus stars with the TESS mission
• The GALAH survey: An abundance, age, and kinematic inventory of the solar neighbourhood made with TGAS
• Pan-STARRS Pixel Analysis : Source Detection and Characterization
• The Southern Stellar Stream Spectroscopic Survey ($S^5$): Overview, Target Selection, Data Reduction, Validation, and Early Science
• A box full of chocolates: The rich structure of the nearby stellar halo revealed by Gaia and RAVE
• The Proper Motion Field of the Small Magellanic Cloud: Kinematic Evidence for its Tidal Disruption
• The AMBRE Project: chemical evolution models for the Milky Way thick and thin discs
• Gaia Data Release 1, Pre-processing and source list creation
• Molecular gas in debris disks around young A-type stars
• Gravitationally Lensed Quasars in Gaia: II. Discovery of 24 Lensed Quasars
• Wide Binaries in Tycho-{\it Gaia}: Search Method and the Distribution of Orbital Separations
• Complex Spiral Structure in the HD 100546 Transitional Disk as Revealed by GPI and MagAO
• Gaia Data Release 2: Observations of solar system objects
• VLBI-Gaia offsets favor parsec-scale jet direction in Active Galactic Nuclei
• Gaia Data Release 1. Testing the parallaxes with local Cepheids and RR Lyrae stars
• Gaia Data Release 1. Open cluster astrometry: performance, limitations, and future prospects
• Constraining a Thin Dark Matter Disk with Gaia
• The Distribution and Excitation of CH${}_3$CN in a Solar Nebula Analog
• Statistical Analysis of Astrometric Errors for the Most Productive Asteroid Surveys
• Gaia DR2 in 6D: Searching for the fastest stars in the Galaxy
• The AMBRE project: The thick thin disk and thin thick disk of the Milky Way
• Binary deviations from single object astrometry
• HELP: The Herschel Extragalactic Legacy Project
• Old-Aged Stellar Population Distance Indicators
• Gaia Data Release 1: The reference frame and the optical properties of ICRF sources
• Hubble tension or a transition of the Cepheid SnIa calibrator parameters?
• Not All Stars Are the Sun: Empirical Calibration of the Mixing Length for Metal-Poor Stars Using One-dimensional Stellar Evolution Models
• Time-resolved WISE/NEOWISE Coadds
• Kinematics of Highly R-Process-Enhanced Field Stars: Evidence for an Accretion Origin and Detection of Several Groups from Disrupted Satellites
• Empirical photometric calibration of the Gaia Red Clump: colours, effective temperature and absolute magnitude
• Age-resolved chemistry of red giants in the solar neighbourhood
• An Ultra-Hot Neptune in the Neptune desert
• Gaia Data Release 1 - The Cepheid & RR Lyrae star pipeline and its application to the south ecliptic pole region
• Synthetic Stellar Photometry - II. Testing the bolometric flux scale, and tables of bolometric corrections for the Hipparcos/Tycho, Pan-STARRS1, SkyMapper and JWST systems
• BANYAN. IX. The Initial Mass Function and Planetary-Mass Object Space Density of the TW Hya Association
• Multiplicity of Galactic Cepheids and RR Lyrae stars from Gaia DR2 - I. Binarity from proper motion anomaly
• Hunting Black Holes with Gaia
• Galactic Archaeology with asteroseismic ages. II. Confirmation of a delayed gas infall using Bayesian analysis based on MCMC methods
• Standard Galactic Field RR Lyrae. I. Optical to Mid-infrared Phased Photometry
• IMAGINE: A comprehensive view of the interstellar medium, Galactic magnetic fields and cosmic rays
• Red clump stars and Gaia: Calibration of the standard candle using a hierarchical probabilistic model
• Characterising Open Clusters in the solar neighbourhood with the Tycho-Gaia Astrometric Solution
• The Hawaii Infrared Parallax Program. IV. A Comprehensive Parallax Survey of L0-T8 dwarfs with UKIRT
• Galactic Archaeology with Gaia
• The Carnegie-Chicago Hubble Program. II. The Distance to IC 1613: The Tip of the Red Giant Branch and RR Lyrae Period-Luminosity Relations
• SIMP J013656.5+093347 is Likely a Planetary-Mass Object in the Carina-Near Moving Group
• A quantitative analysis of systematic differences in positions and proper motions of Gaia DR2 with respect to VLBI
• Ages and masses of million Galactic disk main sequence turn-off and sub-giant stars from the LAMOST Galactic spectroscopic surveys
• The Gaia-ESO Survey: open clusters in Gaia-DR1 - a way forward to stellar age calibration
• Completeness of the Gaia-verse II: what are the odds that a star is missing from Gaia DR2?
• The SUPERWIDE Catalog: A Catalog of 99,203 Wide Binaries Found in Gaia and Supplemented by the SUPERBLINK High Proper Motion Catalog
• Data Release 3: the Solar System survey
• Not all stars form in clusters - measuring the kinematics of OB associations with $Gaia$
• The Gaia reference frame for bright sources examined using VLBI observations of radio stars
• MASCARA-2 b: A hot Jupiter transiting the $m_V=7.6$ A-star HD185603
• Gaia 1 and 2. A pair of new Galactic star clusters
• Gaia data release 1: Principles of the photometric calibration of the G band
• Mapping the Galactic Metallicity Gradient with Open Clusters: The State-of-the-Art and Future Challenges
• 3D motions in the Sculptor dwarf galaxy as a glimpse of a new era
• On significance of VLBI/Gaia position offsets
• The detection and characterisation of 54 massive companions with the SOPHIE spectrograph -- 7 new brown dwarfs and constraints on the BD desert
• Surround & Squash: The Interstellar Medium around Scorpius Centaurus OB2
• A Unified tool to estimate Distances, Ages and Masses (UniDAM) from spectrophotometric data
• Kinematics of OB-associations in Gaia epoch
• NGC6240: A triple nucleus system in the advanced or final state of merging
• DES meets Gaia: discovery of strongly lensed quasars from a multiplet search
• The HST Large Program on Omega Centauri. I. Multiple stellar populations at the bottom of the main sequence probed in NIR-Optical
• K2-106, a system containing a metal-rich planet and a planet of lower density
• The Gaia Ultracool Dwarf Sample. I. Known L and T dwarfs and the first Gaia data release
• The Solar Neighborhood. XXXIX. Parallax Results from the CTIOPI and NOFS Programs: 50 New Members of the 25 Parsec White Dwarf Sample
• Is the Milky Way still breathing? RAVE-Gaia streaming motions
• Absolute Ages and Distances of 22 GCs using Monte Carlo Main-Sequence Fitting
• Size and shape of Chariklo from multi-epoch stellar occultations
• Under the Firelight: Stellar Tracers of the Local Dark Matter Velocity Distribution in the Milky Way
• New light on the Gaia DR2 parallax zero-point: influence of the asteroseismic approach, in and beyond the Kepler field
• The Ultracool SpeXtroscopic Survey. I. Volume-Limited Spectroscopic Sample and Luminosity Function of M7$-$L5 Ultracool Dwarfs
• The Young L Dwarf 2MASS J11193254-1137466 is a Planetary-Mass Binary
• Gaia EDR3 Parallax Zero-point Offset based on W Ursae Majoris-type Eclipsing Binaries
• The merger and assembly histories of Milky Way- and M31-like galaxies with TNG50: disk survival through mergers
• Testing asteroseismology with Gaia DR2: Hierarchical models of the Red Clump
• The STRong lensing Insights into the Dark Energy Survey (STRIDES) 2017/2018 follow-up campaign: Discovery of 10 lensed quasars and 10 quasar pairs
• The Gaia DR2 parallax zero point: Hierarchical modeling of red clump stars
• Assessing distances and consistency of kinematics in Gaia/TGAS
• Microarcsecond Astrometry: Science Highlights from Gaia
• The geometric distance and binary orbit of PSR B1259-63
• A test of Gaia Data Release 1 parallaxes: implications for the local distance scale
• Hertzsprung-Russell diagram and mass distribution of barium stars
• Large Magellanic Cloud Near-Infrared Synoptic Survey. IV. Leavitt Laws for Type II Cepheid Variables
• Hubble Space Telescope non-detection of PSR J2144-3933: the coldest known neutron star
• Enormous Li-enhancement preceding red giant phases in low-mass stars in the Milky Way halo
• On the accuracy of mass measurement for microlensing black holes as seen by Gaia and OGLE
• Improved distances and ages for stars common to TGAS and RAVE
• Observational consequences of optical band milliarcsecond-scale structure in active galactic nuclei discovered by Gaia
• Chamaeleon DANCe. Revisiting the stellar populations of Chamaeleon I and Chamaeleon II with Gaia-DR2 data
• Gaia's view of the $\lambda$ Boo star puzzle
• Internal motions in OB-associations with Gaia DR2
• Photometry and spectroscopy of multiple populations along the AGB of NGC2808 and NGC6121 (M4)
• Star catalog position and proper motion corrections in asteroid astrometry II: The Gaia era
• The properties of energetically unbound stars in stellar clusters
• A Gaia-PS1-SDSS (GPS1) Proper Motion Catalog Covering 3/4 of the Sky
• A Probabilistic Approach to Fitting Period-Luminosity Relations and Validating Gaia Parallaxes
• Gaia-like astrometry and gravitational waves
• OSSOS: V. Diffusion in the orbit of a high-perihelion distant Solar System object
• Gravitationally Lensed Quasars in Gaia: I. Resolving Small-Separation Lenses
• The effects of rotation on the lithium depletion of G- and K-dwarfs in Messier 35
• A Gaia study of the Hyades open cluster
• Gaia DR2 reveals a very massive runaway star ejected from R136
• Predicting the hypervelocity star population in Gaia
• The excess of cool supergiants from contemporary stellar evolution models defies the metallicity-independent Humphreys-Davidson limit
• Gaia DR1 evidence of disrupting Perseus Arm
• The Kepler view of magnetic chemically peculiar stars
• Gravitational Starlight Deflection Measurements during the 21 August 2017 Total Solar Eclipse
• New and Known Moving Groups And Clusters Identified in a Gaia Co-Moving Catalog
• Triage of Astrometric Binaries - how to find triple systems and dormant black-hole secondaries in the Gaia orbits
• Astrometric evidence for a population of dislodged AGN
• Spectroscopic Validation of Low-Metallicity Stars from RAVE
• High-precision distance measurements with classical pulsating stars
• Astrometry and exoplanets in the Gaia era: a Bayesian approach to detection and parameter recovery
• Observational calibration of the projection factor of Cepheids - III. The long-period Galactic Cepheid RS Puppis
• Galactic Rotation from Cepheids with Gaia DR2 and Effects of Non-Axisymmetry
• On the origin of the wide-orbit circumbinary giant planet HD 106906: A dynamical scenario and its impact on the disk
• The fall of the Northern Unicorn: Tangential motions in the Galactic Anti-centre with SDSS and Gaia
• Quasar lenses and pairs in the VST-ATLAS and Gaia
• The environment of the SN-less GRB 111005A at z = 0.0133
• The White Dwarf Binary Pathways Survey IV: Three close white dwarf binaries with G-type secondary stars
• The Pan-STARRS1 Proper-motion Survey for Young Brown Dwarfs in Nearby Star-forming Regions. I. Taurus Discoveries and a Reddening-free Classification Method for Ultracool Dwarfs
• On the stellar velocity distribution in the solar neighborhood in the light of Gaia DR2
• The completeness-corrected rate of stellar encounters with the Sun from the first Gaia data release
• Observational calibration of the projection factor of Cepheids IV. Period-projection factor relation of Galactic and Magellanic Cloud Cepheids
• Using APOGEE Wide Binaries to Test Chemical Tagging with Dwarf Stars
• Trans-Neptunian objects found in the first four years of the Dark Energy Survey
• Evidence that the Directly-Imaged Planet HD 131399 Ab is a Background Star
• The power of teaming up HST and Gaia: the first proper motion measurement of the distant cluster NGC 2419
• Modelling the KIC8462852 light curves: compatibility of the dips and secular dimming with an exocomet interpretation
• Lithium depletion boundary, stellar associations, and Gaia
• The VMC survey XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud
• Volans-Carina: A New 90 Myr Old Stellar Association at 85 pc
• Star-disc (mis-)alignment in Rho Oph and Upper Sco: insights from spatially resolved disc systems with K2 rotation periods
• Gaia Data Release 2. Calibration and mitigation of electronic offset effects in the data
• MAGI: many-component galaxy initialiser
• The Discovery of a Five-Image Lensed Quasar at z = 3.34 using PanSTARRS1 and Gaia
• Improving dynamical mass constraints for intermediate-period substellar companions using Gaia DR2
• The co-existence of hot and cold gas in debris discs
• Fundamental Properties of Co-Moving Stars observed by $Gaia$
• Determining the true mass of radial-velocity exoplanets with Gaia: 9 planet candidates in the brown-dwarf/stellar regime and 27 confirmed planets
• Asteroseismic versus Gaia distances: a first comparison
• Updated astrometry and masses of the LUH 16 brown dwarf binary
• The discovery of tidal tails around the globular cluster NGC 7492 with Pan-STARRS1
• CCD Parallaxes for 309 Late-type Dwarfs and Subdwarfs
• The Gaia-ESO Survey: age spread in the star forming region NGC6530 from the HR diagram and gravity indicators
• Extragalactic archaeology with the C, N, and O chemical abundances
• The VMC survey -- XLI. Stellar proper motions within the Small Magellanic Cloud
• Using red clump stars to correct the Gaia DR1 parallaxes
• The Second LBA Calibrator Survey of southern compact extragalactic radio sources - LCS2
• Reanalysis of nearby open clusters using Gaia DR1/TGAS and HSOY
• Estimating stellar ages and metallicities from parallaxes and broadband photometry - successes and shortcomings
• A Search for L/T Transition Dwarfs With Pan-STARRS1 and WISE. III. Young L Dwarf Discoveries and Proper Motion Catalogs in Taurus and Scorpius-Centaurus
• The Curious Case of KOI 4: Confirming Kepler's First Exoplanet
• 2MASS J13243553+6358281 is an Early T-Type Planetary-Mass Object in the AB Doradus Moving Group
• Asteroseismic radii of dwarfs: New accuracy constraints from Gaia DR2 parallaxes
• Gaia Assorted Mass Binaries Long Excluded from SLoWPoKES (GAMBLES): Identifying Ultra-Wide Binary Pairs with Components of Diverse Mass
• The Metal-Poor Stellar Halo in RAVE-TGAS and its Implications for the Velocity Distribution of Dark Matter
• A new sample of warm extreme debris disks from the ALLWISE catalog
• Three-dimensional structure of the Upper Scorpius association with the Gaia first data release
• The White Dwarf Binary Pathways Survey VI: two close post common envelope binaries with TESS light curves
• Wolf 1130: A Nearby Triple System Containing a Cool, Ultramassive White Dwarf
• An Optical and Infrared Photometric Study of the Young Open Cluster IC 1805 in the Giant H II Region W4
• Deciphering the evolution of the Milky Way discs: Gaia APOGEE Kepler giant stars and the Besançon Galaxy Model
• New orbits based on speckle interferometry at SOAR. II
• Multi-band photometry and spectroscopy of an all-sky sample of bright white dwarfs
• The Gaia-ESO Survey: the N/O abundance ratio in the Milky Way
• Isochrone fitting in the Gaia era
• Binary evolution along the Red Giant Branch with BINSTAR: The barium star perspective
• Metallicity and age effects on lithium depletion in solar analogues
• An artificial neural network to discover Hypervelocity stars: Candidates in Gaia DR1/TGAS
• Completeness of the Gaia-verse IV: The Astrometry Spread Function of Gaia DR2
• The CARMENES search for exoplanets around M dwarfs: Two Saturn-mass planets orbiting active stars
• Impact of basic angle variations on the parallax zero point for a scanning astrometric satellite
• Weighing in on the masses of retired A stars with asteroseismology: K2 observations of the exoplanet-host star HD 212771
• On the kinematic signature of the Galactic warp as revealed by the LAMOST-TGAS data
• A new compact young moving group around V1062 Sco
• Kinematic structures of the Solar neighbourhood revealed by Gaia DR1/TGAS and RAVE
• Predicted microlensing events from analysis of Gaia Data Release 2
• Models for Sixty Double-Lined Binaries containing Giants
• Optimized trajectories to the nearest stars using lightweight high-velocity photon sails
• A Predicted Astrometric Microlensing Event by a Nearby White Dwarf
• Results from a triple chord stellar occultation and far-infrared photometry of the trans-Neptunian object (229762) 2007 UK126
• A multi-instrument and multi-wavelength high angular resolution study of MWC614: quantum heated particles inside the disk cavity
• Deciphering the Kinematic Structure of the Small Magellanic Cloud through its Red Giant Population
• The dynamical matter density in the solar neighbourhood inferred from Gaia DR1
• ESO452-SC11: The lowest mass globular cluster with a potential chemical inhomogeneity
• The white dwarf binary pathways survey V. The Gaia white dwarf plus AFGK binary sample and the identification of 23 close binaries
• Mapping young stellar populations towards Orion with Gaia DR1
• Absolute Magnitudes of Seismic Red Clumps in the Kepler Field and SAGA: the age dependency of the distance scale
• Searching for central stars of planetary nebulae in Gaia DR2
• The kinematic signature of the Galactic warp in Gaia DR1 - I. The Hipparcos subsample
• The ALMA detection of CO rotational line emission in AGB stars in the Large Magellanic Cloud
• Vertical and radial metallicity gradients in high latitude galactic fields with SDSS
• Chemo-kinematic ages of eccentric-planet-hosting M dwarf stars
• Targeting Bright Metal-poor Stars in the Disk and Halo Systems of the Galaxy
• From globular clusters to the disc: the dual life of our Galaxy
• STREAMFINDER II: A possible fanning structure parallel to the GD-1 stream in Pan-STARRS1
• Small Bodies Near and Far (SBNAF): a benchmark study on physical and thermal properties of small bodies in the Solar System
• The velocity ellipsoid in the Galactic disc using Gaia DR1
• Structured star formation in the Magellanic inter-Cloud region
• The Rotation-Metallicity Relation for the Galactic Disk as Measured in the Gaia DR1 TGAS and APOGEE Data
• The subgiant HR 7322 as an asteroseismic benchmark star
• Determining the mass of the planetary candidate HD 114762 b using Gaia
• The protoplanetary system HD 100546 in H$\alpha$ polarized light from SPHERE/ZIMPOL. A bar-like structure across the disk gap?
• Quasar Lenses and Galactic Streams: Outlier Selection and GAIA Multiplet Detection
• Magnetic Field Strengths and Grain Alignment Variations in the Local Bubble Wall
• Follow-up Imaging of Disk Candidates from the Disk Detective Citizen Science Project: New Discoveries and False-Positives in WISE Circumstellar Disk Surveys
• Kuiper Belt Analogues in Nearby M-type Planet-host Systems
• The REASONS Survey: Resolved Millimeter Observations of a Large Debris Disk Around the Nearby F Star HD 170773
• The high velocity stars in the Local Stellar Halo from Gaia and LAMOST
• Tycho-Gaia Astrometric Solution Parallaxes and Proper Motions for Five Galactic Globular Clusters
• Globular Clusters in High-Redshift Dwarf Galaxies: A Case Study from the Local Group
• Dynamical models to explain observations with SPHERE in planetary systems with double debris belts
• Distances of CVs and related objects derived from Gaia Data Release 1
• Gaia transients in galactic nuclei
• Nano carbon dust emission in proto-planetary disks: the aliphatic-aromatic components
• The Carnegie RR Lyrae Program: Mid-infrared Period-Luminosity relations of RR Lyrae stars in Reticulum
• Simultaneous spectral energy distribution and near-infrared interferometry modeling of HD 142666
• Prediction of astrometric microlensing events from Gaia DR2 proper motions
• Unlocking the secrets of the midplane gas and dust distribution in the young hybrid disc HD 141569
• Short arc orbit determination and imminent impactors in the Gaia era
• Modelling the Milky Way. I -- Method and first results fitting the thick disk and halo with DES-Y3 data
• How to make a mature accreting magnetar
• The spectroscopic indistinguishability of red giant branch and red clump stars
• Probing ISM Structure in Trumpler 14 & Carina I Using The Stratospheric Terahertz Observatory 2
• Comprehensive analysis of HD 105, a young Solar System analog
• The fast transient sky with Gaia
• Metallicity dependence of the Hercules stream in Gaia/RAVE data -- explanation by non-closed orbits
• A UV-to-NIR Study of Molecular Gas in the Dust Cavity Around RY Lupi
• Very Low-Mass Stars and Brown Dwarfs in Upper Scorpius using Gaia DR1: Mass Function, Disks and Kinematics
• Evidence for spatially-correlated $Gaia$ parallax errors in the $Kepler$ field
• Testing the Limits of Precise Subgiant Characterization with APOGEE and Gaia: Opening a Window to Unprecedented Astrophysical Studies
• On the Orbital Inclination of Proxima Centauri b
• The formation of barium giants via mass accretion in binary systems
• Made-to-measure modeling of observed galaxy dynamics
• Precise CCD positions of Triton in 2014-2016 using the newest Gaia DR1 star catalogue
• What is the Milky Way outer halo made of? High resolution spectroscopy of distant red giants
• Absolute dimensions of the eccentric eclipsing binary V541 Cygni
• A radial velocity survey of the Carina Nebula's O-type stars
• The young massive star cluster Westerlund 2 observed with MUSE. III. A cluster in motion -- the complex internal dynamics
• Mapping the Galactic disk with the LAMOST and Gaia red clump sample: IV: the kinematic signature of the Galactic warp
• The local spiral arm in the LAMOST-Gaia common stars?
• A newly discovered double-double candidate microquasar in NGC 300
• Determining Empirical Stellar Masses and Radii Using Transits and Gaia Parallaxes as Illustrated by Spitzer Observations of KELT-11b
• Comparison of the Asteroseismic Mass Scale of Red Clump Giants with Photometric Mass Estimates
• On the relevance of chaos for halo stars in the solar neighbourhood II
• Spatially offset black holes in the Horizon-AGN simulation and comparison to observations
• Multiple kinematical populations in Vela OB2 from Gaia DR1 data
• Three-dimensional dust mapping in the Orion Complex, combining Gaia-TGAS, 2MASS, and WISE
• HATS-39b, HATS-40b, HATS-41b, and HATS-42b: Three Inflated Hot Jupiters and a Super-Jupiter Transiting F Stars
• Probing the origin of UX Ori-type variability in the YSO binary CO Ori with VLTI/GRAVITY
• Testing Asteroseismic Radii of Dwarfs and Subgiants with Kepler and Gaia
• A compilation of known QSOs for the Gaia mission
• The GALAH survey: Co-orbiting stars and chemical tagging
• The quadruple-lined, doubly-eclipsing system V482 Persei
• Antisolar differential rotation with surface lithium enrichment on the single K-giant V1192 Orionis
• Ultracool dwarf benchmarks with \emph{Gaia} primaries
• The SOPHIE search for northern extrasolar planets - XII. Three giant planets suitable for astrometric mass determination with Gaia
• Spectroscopic confirmation and modelling of two lensed quadruple quasars in the Dark Energy Survey public footprint
• Correlations between age, kinematics, and chemistry as seen by the RAVE survey
• Identifying quasars with astrometric and mid-infrared methods from APOP and ALLWISE
• Action-based Dynamical Modeling for the Milky Way Disk: The Influence of Spiral Arms
• Gaia TGAS search for Large Magellanic Cloud runaway supergiant stars:Candidate hypervelocity star discovery, and the nature of R71
• A blinding solution for inference from astronomical data
• Stars with fast Galactic rotation observed in Gaia TGAS: a signature driven by the Perseus arm?
• Gaia predicted brown dwarf detection rates around FGK stars in astrometry, radial velocity, and photometric transits
• Light propagation in the gravitational field of one arbitrarily moving pointlike body in the 2PN approximation
• The universality of the rapid neutron-capture process revealed by a possible disrupted dwarf galaxy star
• Reliability of the measured velocity anisotropy of the Milky Way stellar halo
• Towards the ICRF3: astrometric comparison of the USNO 2016A VLBI solution with ICRF2 and Gaia DR1
• Asteroseismic and orbital analysis of the triple star system HD 188753 observed by Kepler
• Using Action Space Clustering to Constrain the Accretion History of Milky Way like Galaxies
• ALMA reveals thermal and non-thermal desorption of methanol ice in the HD 100546 protoplanetary disk
• Nearby Young, Active, Late-type Dwarfs in Gaia's First Data Release
• Towards the measurement of the mass of isolated neutron stars - Prediction of future astrometric microlensing events by pulsars
• Towards a fully consistent Milky Way disk model -- IV. The impact of Gaia DR2 and APOGEE
• HATS-50b through HATS-53b: four transiting hot Jupiters orbiting G-type stars discovered by the HATSouth survey
• Evidence of a non-conservative mass transfer for XTE J0929-314
• A surprise in the updated list of stellar perturbers of long period comets motion
• Rotationally modulated variability and pulsations of the He-rich star CPD -62 2124 with an extraordinarily strong magnetic field
• Cospatial Star Formation and Supermassive Black Hole Growth in $z\sim 3$ Galaxies: Evidence for In-situ Co-evolution
• Systematic Error of the Gaia DR1 TGAS Parallaxes from Data for the Red Giant Clump
• The $\text{Gaia}$ Ultra-Cool Dwarf Sample $-$ III: Seven new multiple systems containing at least one $\text{Gaia}$ DR2 ultra-cool dwarf
• Inferring binary and trinary stellar populations in photometric and astrometric surveys
• Measuring neutron-star distances and properties with gravitational-wave parallax
• Climbing the cosmic ladder with stellar twins in RAVE with Gaia
• The vertical metallicity gradients of mono-age stellar populations in the Milky Way with the RAVE and Gaia data
• Geometric optics in relativistic cosmology: new formulation and a new observable
• The future of stellar occultations by distant solar system bodies: perspectives from the Gaia astrometry and the deep sky surveys
• Searching for Stars Closely Encountering with the Solar System Based on Data from the Gaia DR1 and RAVE5 Catalogues
• The K2-ESPRINT Project VI: K2-105 b, a Hot-Neptune around a Metal-rich G-dwarf
• The Origin of the 300 km s${}^{-1}$ Stream Near Segue 1
• Light propagation in 2PN approximation in the field of one moving monopole: I. Initial value problem
• Constraining Solar position and velocity with a Nearby Hypervelocity Star
• The SOPHIE search for northern extrasolar planets. XVIII: Six new cold Jupiters, including one of the most eccentric exoplanet orbits
• Validating TGAS wide binaries with Gaia DR2 Radial Velocities and Parallaxes
• Astrometry in crowded fields towards the Galactic Bulge
• A NuSTAR view of SS433: Precessional evolution of the jet-disk system
• A Spectroscopic Survey of Field Red Horizontal-Branch Stars
• The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae
• $\text{Siriusly}$, a newly identified intermediate-age Milky Way stellar cluster: A spectroscopic study of $\text{Gaia}$ 1
• A Differential Abundance Analysis of Very Metal-Poor Stars
• Testing stellar proper motions of the TGAS using data of the HSOY, UCAC5 and PMA catalogues
• The Gaia Data Release 1 parallaxes and the distance scale of Galactic planetary nebulae
• New binaries in the epsilon Cha association
• Light propagation in 2PN approximation in the field of one moving monopole II. Boundary value problem
• Signatures of the Galactic bar on stellar kinematics unveiled by APOGEE
• Hierarchical probabilistic inference of the color-magnitude diagram and shrinkage of stellar distance uncertainties
• A Search for Variable Stars in the Globular Cluster M4 with K2
• The canonical Luminous Blue Variable AG Car and its neighbor Hen 3-519 are much closer than previously assumed
• The TRENDS High-contrast Imaging Survey. VIII. Compendium of Benchmark Objects
• The intricate Galaxy disk: velocity asymmetries in Gaia-TGAS
• Astrometry and Occultation predictions to Trans-Neptunian and Centaur Objects observed within the Dark Energy Survey
• Improvements to Pan-STARRS1 Astrometry Using Gaia
• Ground-based astrometry calibrated by Gaia DR1: new perspectives in asteroid orbit determination
• Magnetic field geometry and chemical abundance distribution of the He-strong star CPD -57 3509
• Gaia Data Release 1: The archive visualisation service
• Galactic Kinematics Derived from Data in the RAVE5, UCAC4, PPMXL, and Gaia TGAS Catalogs
• Non-Parametric Spherical Jeans Mass Estimation with B-splines
• Analysis of Close Stellar Encounters with the Solar System
• The Global sphere reconstruction (GSR) - Demonstrating an independent implementation of the astrometric core solution for Gaia
• The 14 Her Planetary System: Companion Masses and Architecture from Radial Velocities and Astrometry
• Collisions of Terrestrial Worlds: The Occurrence of Extreme Mid-Infrared Excesses around Low-Mass Field Stars
• New nearby white dwarfs from Gaia DR1 TGAS and UCAC5/URAT
• Ultralow-amplitude RR Lyrae Stars in M4
• HATS-36b and 24 other transiting/eclipsing systems from the HATSouth - K2 Campaign 7 program
• Optical Spectra of Candidate International Celestial Reference Frame (ICRF) Flat-Spectrum Radio Sources. III
• Discovery of a Rare Late-Type, Low-Mass Wolf-Rayet Star in the LMC
• Leaves on trees: identifying halo stars with extreme gradient boosted trees
• Chandra Observations of the field containing HESS J1616-508
• A hierarchical Bayesian model to infer PL(Z) relations using Gaia parallaxes
• The Influence of the Galactic Bar on the Dynamics of Globular Clusters
• Electromagnetic counterparts to gravitational wave events from Gaia
• Search for Close Stellar Encounters with the Solar System Based on Data from the Gaia DR3 Catalogue
• Another look at AM Herculis $-$ radio-astrometric campaign with the e-EVN at 6 cm
• The proper motion of sub-populations in Omega Centauri
• Gaia: the Galaxy in six (and more) dimensions
• An Investigation of Four Chemically Peculiar Stars with Photometric Periods below 12 Hours
• The Science of Fundamental Catalogs
• Testing the distance scale of the Gaia TGAS catalogue by kinematic method
• Digitization and astrometric calibration of Carte du Ciel photographic plates with Gaia~DR1
• Double stars and astrometric uncertainties in Gaia DR1
• The Sloan Digital Sky Survey Reverberation Mapping Project: Photometric g and i Light Curves
• A method to calculate the local density distribution of the Galaxy from the Tycho-Gaia Astrometric Solution data
• BiGONLight: light propagation with bi-local operators in Numerical Relativity
• Proper motions of five OB stars with candidate dusty bow shocks in the Carina Nebula
• Post-linear metric of a compact source of matter
• Prospects for detecting the astrometric signature of Barnard's Star b
• Galaxies as High-Resolution Telescopes
• Towards a fully consistent Milky Way disk model V. The disk model for 4 $-$ 14 kpc
• Substructure at High Speed I: Inferring the Escape Velocity in the Presence of Kinematic Substructure
• Vertical Distribution and Kinematics of Protoplanetary Nebulae in the Galaxy
• The ultraviolet study of B[e] stars: evidence for pulsations, LBV-type variations, and processes in envelope
• Study of Close Stellar Encounters with the Solar System Based on Data from the Gaia EDR3 Catalogue
• Quasars in the Galactic Anti-Center Area from the LAMOST DR3
• TYC 8241 2652 1 and the case of the disappearing disk: no smoking gun yet
• The Effects of Barycentric and Asymmetric Transverse Velocities on Eclipse and Transit Times
• Differential Astrometry with Gaia: Investigating relativistic light deflection close to Jupiter
• SMHASH: A new mid-infrared RR Lyrae distance determination for the Local Group dwarf spheroidal galaxy Sculptor
• Local disc model in view of Gaia DR1 and RAVE data
• Open star clusters in the Milky Way - Comparison of photometric and trigonometric distance scales based on Gaia TGAS data
• The Carnegie-Chicago Hubble Program: Calibration of the Near-Infrared RR Lyrae Period-Luminosity Relation With HST
• Galactic Orbits of Selected Companions of the Milky Way
• A magnetic study of the $\delta$ Scuti variable HD 21190 and the close solar-type background star CPD -83${}^{\circ }$ 64B
• Kinematics of Hot Subdwarfs from the Gaia DR2 Catalogue
• Spectroscopic classification and Gaia DR2 parallaxes of new nearby white dwarfs among selected blue proper motion stars
• Limits on the Electro-Magnetic Counterpart of Binary Black Hole Coalescence at Visible Wavelengths
• An astrometric and spectroscopic study of the $\delta$ Scuti variable HD21190 and its wide companion CPD -83${}^{\circ }$ 64B
• Optical Properties of Interstellar Dust around the Orion A Molecular Cloud
• Period Variations for the Cepheid VZ Cyg
• The circumstellar environment of HD50138 revealed by VLTI/AMBER at high angular resolution
• Overall properties of the Gaia DR1 reference frame
• Optical Polarimetry of KIC 8462852 in May-August 2017
• Concerning the occurrence of bow shocks around high-mass X-ray binaries
• Differential Astrometric Framework for the Jupiter Relativistic Experiment with Gaia
• MUSE observations of the blue compact dwarf galaxy Haro 14. Data analysis and first results on morphology and stellar populations
• Gaia and VLT astrometry of faint stars: Precision of Gaia DR1 positions and updated VLT parallaxes of ultracool dwarfs
• Toward a Measurement of the Transverse Peculiar Velocity of Galaxy Pairs
• Resonant Effects of a Bar on the Galactic Disk Kinematics Perpendicular to Its Plane
• Pulsating star research and the Gaia revolution
• Variable binaries and variables in binaries in the Binary Star Database BDB
• The DR14 APOGEE-TGAS catalogue: Precise chemo-kinematics in the extended solar vicinity
• Frame-dragging effects in a gravitational quantum field theory
• Detecting Exoplanets Using Eclipsing Binaries as Natural Starshades
• Rediscovering the origins of the stellar halo with chemical tagging
• GLACE survey: galaxy activity in ZwCl0024+1652 cluster from strong optical emission lines
• Asteroseismology of red giants & galactic archaeology
• An improved solution to geometric distortion using an orthogonal method
• Astrometric properties of reference frame sources as a function of redshift
• Gaia serial CTI modelling and radiation damage study
• Toward a renewed Galactic Cepheid distance scale from Gaia and optical interferometry
• Gaia space mission and quasars
• Gaia's Cepheids and RR Lyrae Stars and Luminosity Calibrations Based on Tycho-Gaia Astrometric Solution
• The orbital dynamics of the LMC and SMC about the Milky Way
• Precision Time-series Photometry in the Thermal Infrared with a 'Wall-Eyed' Pointing Mode at the Large Binocular Telescope
• Phase spirals induced by the gas warp
• Searching for and characterizing halo substructures with the GALAH DR4 survey
• Apsidal motion and proximity effects in the massive binary BD+60 497
• Impacts of Radial Mixing on the Galactic Thick and Thin Disks
• Search for Stellar Streams Based on Data from the RAVE5 and Gaia TGAS Catalogues
• The GAPS Programme at TNG. LIII. New insights on the peculiar XO-2 system
• Validation of the Gaia Early Data Release 3 parallax zero-point model with asteroseismology