Improved distances and ages for stars common to TGAS and RAVE

Abstract

We combine parallaxes from the first Gaia data release with the spectrophotometric distance estimation framework for stars in the fifth RAVE survey data release. The combined distance estimates are more accurate than either determination in isolation - uncertainties are on average two times smaller than for RAVE-only distances (three times smaller for dwarfs), and 1.4 times smaller than TGAS parallax uncertainties (two times smaller for giants). We are also able to compare the estimates from spectrophotometry to those from Gaia, and use this to assess the reliability of both catalogues and improve our distance estimates. We find that the distances to the lowest log g stars are, on average, overestimated and caution that they may not be reliable. We also find that it is likely that the Gaia random uncertainties are smaller than the reported values. As a byproduct we derive ages for the RAVE stars, many with relative uncertainties less than 20 percent. These results for 219566 RAVE sources have been made publicly available, and we encourage their use for studies that combine the radial velocities provided by RAVE with the proper motions provided by Gaia. A sample that we believe to be reliable can be found by taking only the stars with the flag notification flag_any=0

MNRAS accepted. Updated to final version, reflecting referee reports. Title changed to better reflect scientific content. Data available through RAVE website: https://www.rave-survey.org/project/

References in corpus (23)

• The Gaia mission
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The K2 Mission: Characterization and Early results
• The Radial Velocity Experiment (RAVE): first data release
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• The Radial Velocity Experiment (RAVE): Fifth Data Release
• A Search for Stars of Very Low Metal Abundance. VI. Detailed Abundances of 313 Metal-Poor Stars
• Gaia Data Release 1: Catalogue validation
• The GALAH Survey: Observational Overview and Gaia DR1 companion
• The Tycho-Gaia astrometric solution. How to get 2.5 million parallaxes with less than one year of Gaia data
• Estimating distances from parallaxes. III. Distances of two million stars in the Gaia DR1 catalogue
• A box full of chocolates: The rich structure of the nearby stellar halo revealed by Gaia and RAVE
• The Best and Brightest Metal-Poor Stars
• A new abundance scale for the globular cluster 47 Tuc
• A Unified tool to estimate Distances, Ages and Masses (UniDAM) from spectrophotometric data
• Assessing distances and consistency of kinematics in Gaia/TGAS
• Using red clump stars to correct the Gaia DR1 parallaxes
• BONNSAI: correlated stellar observables in Bayesian methods
• Chromospherically Active Stars in the RAVE Survey. II. Young dwarfs in the Solar neighborhood
• On the discrepancy between asteroseismic and Gaia DR1 TGAS parallaxes
• Detection of a dearth of stars with zero angular momentum in the solar neighbourhood
• TGAS Error Renormalization from the RR Lyrae Period-Luminosity Relation
• RAVE-Gaia and the impact on Galactic archeology

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• StarHorse: A Bayesian tool for determining stellar masses, ages, distances, and extinctions for field stars
• The Sixth Data Release of the Radial Velocity Experiment (RAVE) -- II: Stellar Atmospheric Parameters, Chemical Abundances and Distances
• The Sixth Data Release of the Radial Velocity Experiment (RAVE) -- I: Survey Description, Spectra and Radial Velocities
• Distances and parallax bias in Gaia DR2
• Isochrone ages for ~3 million stars with the second Gaia data release
• The GALAH survey: An abundance, age, and kinematic inventory of the solar neighbourhood made with TGAS
• Constraining a Thin Dark Matter Disk with Gaia
• The information content in cold stellar streams
• Not all stars form in clusters - measuring the kinematics of OB associations with $Gaia$
• Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
• Stellar ages, masses, extinctions and orbital parameters based on spectroscopic parameters of Gaia DR3
• Spiral arm crossings inferred from ridges in Gaia stellar velocity distributions
• Kinematics with Gaia DR2: The Force of a Dwarf
• MADE: A spectroscopic Mass, Age, and Distance Estimator for red giant stars with Bayesian machine learning
• The dynamically selected stellar halo of the Galaxy with Gaia and the tilt of the velocity ellipsoid
• Radial abundance gradients in the outer Galactic disk as traced by main-sequence OB stars
• The Metal-Poor Stellar Halo in RAVE-TGAS and its Implications for the Velocity Distribution of Dark Matter
• The RAdial Velocity Experiment (RAVE): Parameterisation of RAVE spectra based on convolutional neural networks
• Isochrone fitting in the Gaia era
• SETI with Gaia: The observational signatures of nearly complete Dyson spheres
• Astrophysical Parameters from Gaia DR2, 2MASS & AllWISE
• Phase-space Properties and Chemistry of the Sagittarius Stellar Stream Down to the Extremely Metal-poor ($[Fe/H]\lesssim -3$) Regime
• The Cetus-Palca stream: A disrupted small dwarf galaxy. A prequel to the science possible with WEAVE with precise spectro-photometric distances
• Variations in $\alpha$-element ratios trace the chemical evolution of the disk
• Kinetic Tomography. II. A second method for mapping the velocity field of the Milky Way Interstellar Medium and a comparison with spiral structure models
• Discovery of A candidate Hypervelocity star originated from the Sagittarius Dwarf Spheroidal galaxy
• Unbiased TGAS$\times$LAMOST distances and the role of binarity
• Correlations between age, kinematics, and chemistry as seen by the RAVE survey
• The vertical force in the Solar Neighbourhood using red clump stars in TGASxRAVE - Constraints on the local dark matter density
• The vertical metallicity gradients of mono-age stellar populations in the Milky Way with the RAVE and Gaia data
• Leaves on trees: identifying halo stars with extreme gradient boosted trees
• New stellar age estimates using SPInS based on Gaia DR3 photometry and LAMOST DR8 abundances
• Scratching the surface with TGAS and RAVE: disk moving groups in the Solar neighborhood
• Flavours in the box of chocolates: chemical abundances of kinematic substructures in the nearby stellar halo
• Dynamical interplay of disc thickness and the interstellar gas: implication for the longevity of spiral density waves
• The SAPP pipeline for the determination of stellar abundances and atmospheric parameters of stars in the core program of the PLATO mission
• Dwarfs or giants? Stellar metallicities and distances in the Canada-France-Imaging-Survey from $ugrizG$ multi-band photometry