Testing asteroseismology with Gaia DR2: Hierarchical models of the Red Clump

Abstract

Asteroseismology provides fundamental stellar parameters independent of distance, but subject to systematics under calibration. Gaia DR2 has provided parallaxes for a billion stars, which are offset by a parallax zero-point. Red Clump (RC) stars have a narrow spread in luminosity, thus functioning as standard candles to calibrate these systematics. This work measures how the magnitude and spread of the RC in the Kepler field are affected by changes to temperature and scaling relations for seismology, and changes to the parallax zero-point for Gaia. We use a sample of 5576 RC stars classified through asteroseismology. We apply hierarchical Bayesian latent variable models, finding the population level properties of the RC with seismology, and use those as priors on Gaia parallaxes to find the parallax zero-point offset. We then find the position of the RC using published values for the zero-point. We find a seismic temperature insensitive spread of the RC of ~0.03 mag in the 2MASS K band and a larger and slightly temperature-dependent spread of ~0.13 mag in the Gaia G band. This intrinsic dispersion in the K band provides a distance precision of ~1% for RC stars. Using Gaia data alone, we find a mean zero-point of -41 $\pm$ 10 $\mu$as. This offset yields RC absolute magnitudes of -1.634 $\pm$ 0.018 in K and 0.546 $\pm$ 0.016 in G. Obtaining these same values through seismology would require a global temperature shift of ~-70 K, which is compatible with known systematics in spectroscopy.

arXiv commentAccepted for publication in MNRAS

References in corpus (92)

• Scikit-learn: Machine Learning in Python
• Astropy: A Community Python Package for Astronomy
• Gaia Data Release 2. Summary of the contents and survey properties
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Gaia mission
• 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
• Gaia Data Release 2: The astrometric solution
• Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2
• Gaia Data Release 2: using Gaia parallaxes
• 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
• Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars
• KEPLER's First Rocky Planet: Kepler-10b
• Asteroseismology of Solar-Type and Red-Giant Stars
• Estimating distances from parallaxes
• Revised Stellar Properties of Kepler Targets for the Quarter 1-16 Transit Detection Run
• Galactic Reddening in 3D from Stellar Photometry - An Improved Map
• Spin down of the core rotation in red giants
• Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology
• Testing Scaling Relations for Solar-Like Oscillations from the Main Sequence to Red Giants using Kepler Data
• Seismic evidence for a rapidly rotating core in a lower-giant-branch star observed with Kepler
• Gaia Data Release 1: Catalogue validation
• Asteroseismic fundamental properties of solar-type stars observed by the NASA Kepler Mission
• Seismic constraints on the radial dependence of the internal rotation profiles of six Kepler subgiants and young red giants
• Asteroseismology of old open clusters with Kepler: direct estimate of the integrated RGB mass loss in NGC6791 and NGC6819
• The APOKASC Catalog: An Asteroseismic and Spectroscopic Joint Survey of Targets in the Kepler Fields
• Fundamental Properties of Kepler Planet-Candidate Host Stars using Asteroseismology
• Evidence for a systematic offset of -80 micro-arcseconds in the Gaia DR2 parallaxes
• Ensemble Asteroseismology of Solar-Type Stars with the NASA Kepler Mission
• Stellar Spin-Orbit Misalignment in a Multiplanet System
• The Second APOKASC Catalog: The Empirical Approach
• Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run
• On the use of Gaia magnitudes and new tables of bolometric corrections
• Calculating asteroseismic diagrams for solar-like oscillations
• Preparation of Kepler lightcurves for asteroseismic analyses
• Synthetic Stellar Photometry - I. General considerations and new transformations for broad-band systems
• Asteroseismology and Gaia: Testing Scaling Relations Using 2200 Kepler Stars with TGAS Parallaxes
• Standing on the shoulders of Dwarfs: the $Kepler$ asteroseismic LEGACY sample I - oscillation mode parameters
• Probing the core structure and evolution of red giants using gravity-dominated mixed modes observed with Kepler
• Asteroseismology of 16000 Kepler Red Giants: Global Oscillation Parameters, Masses, and Radii
• The underlying physical meaning of the ${\nu }_{\max }-{\nu }_{\mathrm{c}}$ relation
• K-Band Calibration of the Red Clump Luminosity
• Galactic archaeology: mapping and dating stellar populations with asteroseismology of red-giant stars
• Stellar population synthesis based modelling of the Milky Way using asteroseismology of 13000 Kepler red giants
• Data analysis recipes: Fitting a model to data
• Population effects on the red giant clump absolute magnitude: The K-band
• Testing the asteroseismic scaling relations for Red Giants with Eclipsing Binaries Observed by Kepler
• Period spacings in red giants II. Automated measurement
• Asteroseismic determination of obliquities of the exoplanet systems Kepler-50 and Kepler-65
• A secondary clump of red giant stars: why and where
• Properties of 42 Solar-type Kepler Targets from the Asteroseismic Modeling Portal
• Distances and parallax bias in Gaia DR2
• Asteroseismic Investigation of Known Planet Hosts in the Kepler Field
• The asteroseismic potential of Kepler: first results for solar-type stars
• Oscillation frequencies for 35 \Kepler solar-type planet-hosting stars using Bayesian techniques and machine learning
• Measuring the vertical age structure of the Galactic disc using asteroseismology and SAGA
• Estimating distances from parallaxes. II. Performance of Bayesian distance estimators on a Gaia-like catalogue
• Interferometric radii of bright Kepler stars with the CHARA Array: θ Cygni and 16 Cygni A and B
• Stellar ages and convective cores in field main-sequence stars: first asteroseismic application to two Kepler targets
• A reanalysis of the Gaia Data Release 2 photometric sensitivity curves using HST/STIS spectrophotometry
• Estimating distances from parallaxes. III. Distances of two million stars in the Gaia DR1 catalogue
• Probing populations of red giants in the galactic disk with CoRoT
• Stellar parameters and chemical abundances of 223 evolved stars with and without planets
• Impact on asteroseismic analyses of regular gaps in Kepler data
• Stroemgren survey for Asteroseismology and Galactic Archaeology: let the SAGA begin
• Determining stellar parameters of asteroseismic targets: going beyond the use of scaling relations
• Period spacings in red giants I. Disentangling rotation and revealing core structure discontinuities
• Automated preparation of Kepler time series of planet hosts for asteroseismic analysis
• Asteroseismic inference on rotation, gyrochronology and planetary system dynamics of 16 Cygni
• Characterisation of red-giant stars in the public Kepler data
• Oscillating red giants observed during Campaign 1 of the Kepler K2 mission: New prospects for galactic archaeology
• GAIA Cepheid parallaxes and 'Local Hole' relieve $H_0$ tension
• Establishing the accuracy of asteroseismic mass and radius estimates of giant stars. I. Three eclipsing systems at [Fe/H]~ -0.3 and the need for a large high-precision sample
• The red clump absolute magnitude based on revised Hipparcos parallaxes
• Changing the ${\nu }_{\max }$ Scaling Relation: The Need For a Mean Molecular Weight Term
• Synthetic Stellar Photometry - II. Testing the bolometric flux scale, and tables of bolometric corrections for the Hipparcos/Tycho, Pan-STARRS1, SkyMapper and JWST systems
• The Optical Gravitational Lensing Experiment. Red Clump Stars as a Distance Indicator
• Red clump stars and Gaia: Calibration of the standard candle using a hierarchical probabilistic model
• A New Method for the Asteroseismic Determination of the Evolutionary State of Red-Giant Stars
• The Red-Giant Branch Bump Revisited: Constraints on Envelope Overshooting in a Wide Range of Masses and Metallicities
• Probing the deep end of the Milky Way with \emph{Kepler}: Asteroseismic analysis of 854 faint Red Giants misclassified as Cool Dwarfs
• Stellar ages, masses and radii from asteroseismic modeling are robust to systematic errors in spectroscopy
• Using red clump stars to correct the Gaia DR1 parallaxes
• Asteroseismic radii of dwarfs: New accuracy constraints from Gaia DR2 parallaxes
• Absolute Magnitudes of Seismic Red Clumps in the Kepler Field and SAGA: the age dependency of the distance scale
• Systematic Differences in Spectroscopic Analysis of Red Giants
• Evidence for spatially-correlated $Gaia$ parallax errors in the $Kepler$ field
• Constraining the core-rotation rate in red-giant stars from Kepler space photometry
• The Gaia sky: version 1.0

Cited by in corpus (43)

• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• The birth of the Milky Way as uncovered by accurate stellar ages with Gaia
• Age dissection of the Milky Way discs: red giants in the Kepler field
• Confirmation of the $Gaia$ DR2 parallax zero-point offset using asteroseismology and spectroscopy in the $Kepler$ field
• The pattern speed of the Milky Way bar from transverse velocities
• Chronologically dating the early assembly of the Milky Way
• Keeping it Cool: Much Orbit Migration, yet Little Heating, in the Galactic Disk
• Weakened magnetic braking supported by asteroseismic rotation rates of Kepler dwarfs
• Testing the radius scaling relation with $Gaia$ DR2 in the $Kepler$ field
• New light on the Gaia DR2 parallax zero-point: influence of the asteroseismic approach, in and beyond the Kepler field
• The Gaia DR2 parallax zero point: Hierarchical modeling of red clump stars
• Microarcsecond Astrometry: Science Highlights from Gaia
• Prospects for Galactic and stellar astrophysics with asteroseismology of giant stars in the $TESS$ Continuous Viewing Zones and beyond
• The K2 Galactic Archaeology Program Data Release 3: Age-abundance patterns in C1-C8 and C10-C18
• Asteroseismology of 3,642 Kepler Red Giants: Correcting the Scaling Relations based on Detailed Modeling
• Spectroscopic and seismic analysis of red giants in eclipsing binaries discovered by Kepler
• New LZ and PW(Z) relations of RR Lyrae stars calibrated with Gaia EDR3 parallaxes
• Revised extinctions and radii for 1.5 million stars observed by APOGEE, GALAH, and RAVE
• Testing the intrinsic scatter of the asteroseismic scaling relations with Kepler red giants
• The K2 Galactic Archaeology Program Data Release 2: Asteroseismic results from campaigns 4, 6, & 7
• Maximum Entropy Estimation of the Galactic Bulge Morphology via the VVV Red Clump
• Hierarchically modelling Kepler dwarfs and subgiants to improve inference of stellar properties with asteroseismology
• Exploring the differences of integrated and spatially resolved analysis using integral field unit data: The case of Abell 14
• The extinction law in the inner $3\times 3$ deg${}^2$ of the Milky Way and the red clump absolute magnitude in the inner bar-bulge
• HD-TESS: An Asteroseismic Catalog of Bright Red Giants within TESS Continuous Viewing Zones
• Fundamental properties of Kepler and CoRoT targets -- IV. Masses and radii from frequencies of minimum $\Delta \nu$ and their implications
• The tilt of the velocity ellipsoid in the Milky Way with Gaia DR2
• Clumpiness: Time-domain classification of red-giant evolutionary states
• Distance mapping applied to four well-known planetary nebulae and a nova shell
• A study of the Czernik 2 and NGC 7654 open clusters using CCD UBV photometric and Gaia EDR3 data
• Investigating Gaia EDR3 parallax systematics using asteroseismology of Cool Giant Stars observed by Kepler, K2, and TESS II. Deciphering Gaia parallax systematics using red clump stars
• Two New Nova Shells associated with V4362 Sagittarii and DO Aquilae
• XO-7 b: A transiting hot Jupiter with a massive companion on a wide orbit
• Mapping Gaia parallax systematic errors over the sky with faint Milky Way stars
• Benfords law in the Gaia universe
• Distribution of red clump stars does not support the X-shaped Galactic bulge
• The recurrent impact of the Sagittarius dwarf on the Milky Way star formation history
• The Science of Fundamental Catalogs
• Non-Parametric Density Reconstruction of the Galactic Bulge Area using Red Clump Stars in the VVV Survey
• Weighing stars from birth to death: mass determination methods across the HRD
• Coralie radial velocity search for companions around evolved stars (CASCADES) II. Seismic masses for three red giants orbited by long-period massive planets
• Fundamental properties of stars from Kepler and Gaia data: parallax offset and revised scaling relations
• Validation of the Gaia Early Data Release 3 parallax zero-point model with asteroseismology