Validation of the Gaia Early Data Release 3 parallax zero-point model with asteroseismology

Abstract

The Gaia Early Data Release 3 (EDR3) provides trigonometric parallaxes for 1.5 billion stars, with reduced systematics compared to Gaia Data Release 2 and reported precisions better by up to a factor of two. New to EDR3 is a tentative model for correcting the parallaxes of magnitude-, position-, and color-dependent systematics for five- and six-parameter astrometric solutions, $Z_5$ and $Z_6$. Using a sample of over 2,000 first-ascent red giant branch stars with asteroseismic parallaxes, I perform an independent check of the $Z_5$ model in a Gaia magnitude range of $9\lesssim G\lesssim 13$ and color range of $1.4\mu {\mathrm{m}}^{-1}\lesssim {\nu }_{\mathrm{eff}}\lesssim 1.5\mu {\mathrm{m}}^{-1}$. This analysis therefore bridges the Gaia team's consistency check of $Z_5$ for $G>13$, and indications from independent analysis using Cepheids of a $\approx 15\mu \mathrm{as}$ over-correction for $G<11$. I find an over-correction sets in at $G\lesssim 10.8$, such that $Z_5$-corrected EDR3 parallaxes are larger than asteroseismic parallaxes by $15\pm 3\mu \mathrm{as}$. For $G\gtrsim 10.8$, EDR3 and asteroseismic parallaxes in the Kepler field agree up to a constant consistent with expected spatial variations in EDR3 parallaxes after a linear, color-dependent adjustment. I also infer an average under-estimation of EDR3 parallax uncertainties in the sample of $22\pm 6\%$, consistent with the Gaia team's estimates at similar magnitudes and independent analysis using wide binaries. Finally, I extend the Gaia team's parallax spatial covariance model to brighter magnitudes ($G<13$) and smaller scales (down to $\approx 0.1°$), where systematic EDR3 parallax uncertainties are at least $\approx 3-4\mu \mathrm{as}$.

arXiv commentPublished in AJ

References in corpus (71)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• The NumPy array: a structure for efficient numerical computation
• Gaia Data Release 2. Summary of the contents and survey properties
• Measuring Reddening with SDSS Stellar Spectra and Recalibrating SFD
• Modules for Experiments in Stellar Astrophysics (MESA)
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• 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
• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• ASPCAP: The Apogee Stellar Parameter and Chemical Abundances Pipeline
• Gaia Data Release 2: Catalogue validation
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant
• On the use of empirical bolometric corrections for stars
• The Data Reduction Pipeline for the Apache Point Observatory Galactic Evolution Experiment
• A new implementation of the infrared flux method using the 2MASS catalogue
• Abundances, Stellar Parameters, and Spectra From the SDSS-III/APOGEE Survey
• The APOGEE-2 Survey of the Orion Star Forming Complex II: Six-dimensional structure
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE) Spectrographs
• The Second APOKASC Catalog: The Empirical Approach
• Calculating asteroseismic diagrams for solar-like oscillations
• APOGEE Data Releases 13 and 14: Data and Analysis
• Asteroseismology and Gaia: Testing Scaling Relations Using 2200 Kepler Stars with TGAS Parallaxes
• Parallax Systematics and Photocenter Motions of Benchmark Eclipsing Binaries in Gaia EDR3
• Asteroseismology of 16000 Kepler Red Giants: Global Oscillation Parameters, Masses, and Radii
• The underlying physical meaning of the ${\nu }_{\max }-{\nu }_{\mathrm{c}}$ relation
• Stellar population synthesis based modelling of the Milky Way using asteroseismology of 13000 Kepler red giants
• Bayesian distances and extinctions for giants observed by Kepler and APOGEE
• Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members. II. age dependencies and new insights
• Confirmation of the $Gaia$ DR2 parallax zero-point offset using asteroseismology and spectroscopy in the $Kepler$ field
• Simultaneous calibration of spectro-photometric distances and the Gaia DR2 parallax zero-point offset with deep learning
• Distances and parallax bias in Gaia DR2
• RR Lyrae stars as standard candles in the Gaia Data Release 2 Era
• Gaia Data Release 2. Cross-match with external catalogues - Algorithms and results
• Evidence for a systematic offset of $-$0.25 mas in the Gaia DR1 parallaxes
• Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members. I. Measurements, methods, and first results
• Significantly improving stellar mass and radius estimates: A new reference function for the Δν scaling relation
• The Cepheid period -- luminosity -- metallicity relation based on Gaia DR2 data
• A new standard: Age and distance for the open cluster NGC 6791 from the eclipsing binary member V20
• Testing the radius scaling relation with $Gaia$ DR2 in the $Kepler$ field
• Challenges for asteroseismic analysis of Sun-like stars
• New light on the Gaia DR2 parallax zero-point: influence of the asteroseismic approach, in and beyond the Kepler field
• The Parallax Zero-Point of Gaia Early Data Release 3 from LAMOST Primary Red Clump Stars
• The Gaia DR2 parallax zero point: Hierarchical modeling of red clump stars
• Testing asteroseismology with Gaia DR2: Hierarchical models of the Red Clump
• WOCS 40007: A Detached Eclipsing Binary near the Turnoff of the Open Cluster NGC 6819
• A Long-Period Totally Eclipsing Binary Star at the Turnoff of the Open Cluster NGC 6819 Discovered with Kepler
• Determining the Age of the Kepler Open Cluster NGC 6819 With a New Triple System and Other Eclipsing Binary Stars
• Nonlinear seismic scaling relations
• RR Lyrae variables in Messier 53: Near-infrared Period--Luminosity relations and the calibration using Gaia Early Data Release 3
• Asteroseismic versus Gaia distances: a first comparison
• Using red clump stars to correct the Gaia DR1 parallaxes
• Distance Dependent Offsets between Parallaxes for Nearby Stars and Gaia DR1 Parallaxes
• Impact of basic angle variations on the parallax zero point for a scanning astrometric satellite
• Testing the intrinsic scatter of the asteroseismic scaling relations with Kepler red giants
• Distant White Dwarfs in the US Naval Observatory Flagstaff Station Parallax Sample
• A comprehensive study of 94 open clusters based on the data from IPHAS, GAIA DR2, and other sky surveys
• Infrared $K_s$-band Photometry of Field RR Lyrae Variable Stars
• Evidence for spatially-correlated $Gaia$ parallax errors in the $Kepler$ field
• Kinematics and Multi Band Period-Luminosity-Metallicity Relation of RR Lyrae Stars via Statistical Parallax
• A theoretical scenario for Galactic RR Lyrae in the Gaia database: constraints on the parallax offset
• Distance scale for high-luminosity stars in OB associations and in field with Gaia DR2. Spurious systematic motions
• WIYN Open Cluster Study LXXX: HDI CCD $UBVRI$ Photometry of the Old Open Cluster NGC 7142 and Comparison to M67
• Mapping Gaia parallax systematic errors over the sky with faint Milky Way stars
• Parameters of the Link between the Optical and Radio Frames from Gaia DR2 Data and VLBI Measurements