The K2 Galactic Archaeology Program Data Release 3: Age-abundance patterns in C1-C8 and C10-C18

Abstract

We present the third and final data release of the K2 Galactic Archaeology Program (K2 GAP) for Campaigns C1-C8 and C10-C18. We provide asteroseismic radius and mass coefficients, ${\kappa }_R$ and ${\kappa }_M$, for $\sim 19,000$ red giant stars, which translate directly to radius and mass given a temperature. As such, K2 GAP DR3 represents the largest asteroseismic sample in the literature to date. K2 GAP DR3 stellar parameters are calibrated to be on an absolute parallactic scale based on Gaia DR2, with red giant branch and red clump evolutionary state classifications provided via a machine-learning approach. Combining these stellar parameters with GALAH DR3 spectroscopy, we determine asteroseismic ages with precisions of $\sim 20-30\%$ and compare age-abundance relations to Galactic chemical evolution models among both low- and high-$\alpha$ populations for $\alpha$, light, iron-peak, and neutron-capture elements. We confirm recent indications in the literature of both increased Ba production at late Galactic times, as well as significant contribution to r-process enrichment from prompt sources associated with, e.g., core-collapse supernovae. With an eye toward other Galactic archaeology applications, we characterize K2 GAP DR3 uncertainties and completeness using injection tests, suggesting K2 GAP DR3 is largely unbiased in mass/age and with uncertainties of $2.9\%(stat.)\pm 0.1\%(syst.)$ & $6.7\%(stat.)\pm 0.3\%(syst.)$ in ${\kappa }_R$ & ${\kappa }_M$ for red giant branch stars and $4.7\%(stat.)\pm 0.3\%(syst.)$ & $11\%(stat.)\pm 0.9\%(syst.)$ for red clump stars. We also identify percent-level asteroseismic systematics, which are likely related to the time baseline of the underlying data, and which therefore should be considered in TESS asteroseismic analysis.

arXiv commentPublished in ApJ; machine-readable tables available through the open access online journal article

References in corpus (162)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• emcee: The MCMC Hammer
• The NumPy array: a structure for efficient numerical computation
• The chemical composition of the Sun
• Gaia Data Release 2. Summary of the contents and survey properties
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• Gaia Data Release 2: The astrometric solution
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The K2 Mission: Characterization and Early results
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
• The Sixteenth Data Release of the Sloan Digital Sky Surveys: First Release from the APOGEE-2 Southern Survey and Full Release of eBOSS Spectra
• SEGUE: A Spectroscopic Survey of 240,000 stars with g=14-20
• Co-formation of the Galactic disc and the stellar halo
• The Chemical Evolution of the Galaxy: the two-infall model
• The Radial Velocity Experiment (RAVE): first data release
• Neutron capture in low mass Asymptotic Giant Branch stars: cross sections and abundance signatures
• Galactic Chemical Evolution: Hydrogen Through Zinc
• The GALAH Survey: Scientific Motivation
• A geometric distance measurement to the Galactic Center black hole with 0.3% uncertainty
• ASPCAP: The Apogee Stellar Parameter and Chemical Abundances Pipeline
• Chemical evolution with radial mixing
• Nucleosynthesis in neutrino-driven winds: I. The physical conditions
• Chemical Cartography with APOGEE: Metallicity Distribution Functions and the Chemical Structure of the Milky Way Disk
• The GALAH+ Survey: Third Data Release
• Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars
• A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
• Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program.Galactic stellar populations and planets
• Neutron-Capture Elements in the Early Galaxy: Insights from a Large Sample of Metal-Poor Giants
• The age structure of stellar populations in the solar vicinity. Clues of a two-phase formation history of the Milky Way disk
• The Hamburg/ESO R-process Enhanced Star survey (HERES) II. Spectroscopic analysis of the survey sample
• A Three-Dimensional Map of Milky-Way Dust
• Vertical waves in the solar neighbourhood in Gaia DR2
• The Data Reduction Pipeline for the Apache Point Observatory Galactic Evolution Experiment
• The Galactic Thick Disk Stellar Abundances
• A new implementation of the infrared flux method using the 2MASS catalogue
• Abundances, Stellar Parameters, and Spectra From the SDSS-III/APOGEE Survey
• Spectroscopy Made Easy: Evolution
• Target Selection for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• Collapsars as a major source of r-process elements
• The Cannon: A data-driven approach to stellar label determination
• The GALAH Survey: Second Data Release
• Spectroscopic Studies of Extremly Metal-Poor Stars with Subaru/HDS:II.The r-process Elements, Including Thorium
• Origin and structure of the Galactic disc(s)
• In disguise or out of reach: first clues about in-situ and accreted stars in the stellar halo of the Milky Way from Gaia DR2
• Asteroseismology of old open clusters with Kepler: direct estimate of the integrated RGB mass loss in NGC6791 and NGC6819
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE) Spectrographs
• The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8
• The Second APOKASC Catalog: The Empirical Approach
• Gaia FGK Benchmark Stars: Effective temperatures and surface gravities
• Nucleosynthesis in neutrino-driven winds: II. Implications for heavy element synthesis
• Target Selection for the SDSS-IV APOGEE-2 Survey
• 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
• Electron-capture supernovae as the origin of elements beyond iron
• Low-Metallicity Inhibition of Type Ia Supernovae and Galactic and Cosmic Chemical Evolution
• Slowly fading super-luminous supernovae that are not pair-instability explosions
• On Galactic density modeling in the presence of dust extinction
• High-precision abundances of elements in solar twin stars: Trends with stellar age and elemental condensation temperature
• Asteroseismology of red giants from the first four months of Kepler data: Fundamental parameters
• Fundamental Properties of Stars using Asteroseismology from Kepler & CoRoT and Interferometry from the CHARA Array
• Chemodynamical Simulations of the Milky Way Galaxy
• Determining global parameters of the oscillations of solar-like stars
• Asteroseismology of 16000 Kepler Red Giants: Global Oscillation Parameters, Masses, and Radii
• Red-giant seismic properties analyzed with CoRoT
• The relation between $\Delta \nu$ and ${\nu }_{max}$ for solar-like oscillations
• The underlying physical meaning of the ${\nu }_{\max }-{\nu }_{\mathrm{c}}$ relation
• On detecting the large separation in the autocorrelation of stellar oscillation times series
• The GALAH survey and Gaia DR2: dissecting the stellar disc's phase space by age, action, chemistry and location
• The GALAH Survey: Observational Overview and Gaia DR1 companion
• Spectroscopic determination of masses (and implied ages) for red giants
• Isochrone ages for field dwarfs: method and application to the age-metallicity relation
• Tracing chemical evolution over the extent of the Milky Way's Disk with APOGEE Red Clump Stars
• Stellar population synthesis based modelling of the Milky Way using asteroseismology of 13000 Kepler red giants
• Asteroseismology of red giants from the first four months of Kepler data: Global oscillation parameters for 800 stars
• Galactic Archaeology with asteroseismic ages: evidence for delayed gas infall in the formation of the Milky Way disc
• On the Formation of Galactic Thick Disks
• Young [$\alpha$/Fe]-enhanced stars discovered by CoRoT and APOGEE: What is their origin?
• Age dissection of the Milky Way discs: red giants in the Kepler field
• The intermediate r-process in core-collapse supernovae driven by the magneto-rotational instability
• The Role of Type Ia Supernovae in Chemical Evolution I: Lifetime of Type Ia Supernovae and Galactic Supernova Rates
• Vertical disc heating in Milky Way-sized galaxies in a cosmological context
• Neutron Star Mergers as sites of r-process Nucleosynthesis and Short Gamma-Ray Bursts
• Confirmation of the $Gaia$ DR2 parallax zero-point offset using asteroseismology and spectroscopy in the $Kepler$ field
• Verifying asteroseismically determined parameters of Kepler stars using hipparcos parallaxes: self-consistent stellar properties and distances
• Systematic non-LTE study of the $-2.6\le$ [Fe/H] $\le 0.2$ F and G dwarfs in the solar neighbourhood. II. Abundance patterns from Li to Eu
• The $R$-Process Alliance: First Release from the Southern Search for $r$-Process-Enhanced Stars in the Galactic Halo
• Confirming chemical clocks: asteroseismic age dissection of the Milky Way disk(s)
• Distances and parallax bias in Gaia DR2
• Probing the Neutron-Capture Nucleosynthesis History of Galactic Matter
• Measuring the vertical age structure of the Galactic disc using asteroseismology and SAGA
• The origin and evolution of r- and s-process elements in the Milky Way stellar disk
• Chemical Cartography with APOGEE: Multi-element abundance ratios
• The Octave (Birmingham - Sheffield Hallam) automated pipeline for extracting oscillation parameters of solar-like main-sequence stars
• The TESS-HERMES survey Data Release 1: high-resolution spectroscopy of the TESS southern continuous viewing zone
• Impact on asteroseismic analyses of regular gaps in Kepler data
• The asteroseismic potential of TESS: exoplanet-host stars
• New Type Ia supernova Yields and the Manganese and Nickel Problems in the Milky Way and Dwarf Spheroidal Galaxies
• An update to the EVEREST K2 pipeline: Short cadence, saturated stars, and Kepler-like photometry down to Kp = 15
• High-precision abundances of elements in solar-type stars. Evidence of two distinct sequences in abundance-age relations
• Enhanced production of barium in low-mass stars: evidence from open clusters
• Automated preparation of Kepler time series of planet hosts for asteroseismic analysis
• Gap interpolation by inpainting methods : Application to Ground and Space-based Asteroseismic data
• Disk heating by more than one spiral density wave
• Oscillating red giants observed during Campaign 1 of the Kepler K2 mission: New prospects for galactic archaeology
• The imprint of clump formation at high redshift. I. A disc alpha-abundance dichotomy
• Testing the Asteroseismic Mass Scale Using Metal-Poor Stars Characterized with APOGEE and Kepler
• Galactic Archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE
• Dissecting simulated disc galaxies II: the age-velocity relation
• The origin of diverse $\alpha$-element abundances in galaxy discs
• The GALAH Survey: Non-LTE departure coefficients for large spectroscopic surveys
• 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
• Binary stars in the Galactic thick disc
• The AMBRE project: The thick thin disk and thin thick disk of the Milky Way
• Cannibals in the thick disk: the young $\alpha -$rich stars as evolved blue stragglers
• The photospheric solar oxygen project: IV. 3D-NLTE investigation of the 777 nm triplet lines
• Non-radial oscillations in M-giant semi-regular variables: Stellar models and Kepler observations
• Period-luminosity relations in evolved red giants explained by solar-like oscillations
• The vertical motion history of disk stars throughout the Galaxy
• A Bayesian approach to scaling relations for amplitudes of solar-like oscillations in Kepler stars
• The K2 Galactic Archaeology Program Data Release 1: Asteroseismic results from Campaign 1
• Changing the ${\nu }_{\max }$ Scaling Relation: The Need For a Mean Molecular Weight Term
• The GALAH survey: The data reduction pipeline
• Fundamental relations for the velocity dispersion of stars in the Milky Way
• Deep Learning Classification in Asteroseismology
• Testing the radius scaling relation with $Gaia$ DR2 in the $Kepler$ field
• Challenges for asteroseismic analysis of Sun-like stars
• The K2-HERMES Survey: Age and Metallicity of the Thick Disc
• The effect of bars and transient spirals on the vertical heating in disk galaxies
• Deep Learning Classification in Asteroseismology Using an Improved Neural Network: Results on 15000 Kepler Red Giants and Applications to K2 and TESS Data
• Galactic Simulations of r-process Elemental Abundances
• New light on the Gaia DR2 parallax zero-point: influence of the asteroseismic approach, in and beyond the Kepler field
• Abundance-age relations with red clump stars in open clusters
• 3D LTE spectral line formation with scattering in red giant stars
• Testing asteroseismology with Gaia DR2: Hierarchical models of the Red Clump
• Solar-like oscillations in red giants observed with \textit{Kepler}: influence of increased timespan on global oscillation parameters
• The Gaia DR2 parallax zero point: Hierarchical modeling of red clump stars
• Assessing distances and consistency of kinematics in Gaia/TGAS
• The Gaia-ESO Survey: the origin and evolution of s-process elements
• Probing the deep end of the Milky Way with \emph{Kepler}: Asteroseismic analysis of 854 faint Red Giants misclassified as Cool Dwarfs
• Abundance ratios in GALAH DR2 and their implications for nucleosynthesis
• The K2-HERMES Survey. I. Planet Candidate Properties from K2 Campaigns 1-3
• Nonlinear seismic scaling relations
• Mapping the Galactic disk with the LAMOST and $Gaia$ Red clump sample: V: On the origin of the "young" [$\alpha$/Fe]-enhanced stars
• Fundamental properties of Kepler and CoRoT targets: III. Tuning scaling relations using the first adiabatic exponent
• Yule-Simpson's paradox in Galactic Archaeology
• Neutrino-heated winds from rotating proto-magnetars
• Barium and Yttrium abundance in intermediate-age and old open clusters
• The K2 Galactic Caps Project -- Going Beyond the \textit{Kepler} Field and Ageing the Galactic Disc
• Investigating surface correction relations for RGB stars
• The K2 Galactic Archaeology Program Data Release 2: Asteroseismic results from campaigns 4, 6, & 7
• The Stars Kepler Missed: Investigating the Kepler Target Selection Function Using Gaia DR2
• The GALAH Survey: Temporal Chemical Enrichment of the Galactic Disk
• On the impact of the structural surface effect on global stellar properties and asteroseismic analyses
• An Intermediate-age Alpha-rich Galactic Population in K2
• Evidence for spatially-correlated $Gaia$ parallax errors in the $Kepler$ field
• Convective Excitation and Damping of Solar-like Oscillations
• Barium abundance in red giants of NGC 6752. Non-local thermodynamic equilibrium and three-dimensional effects
• Comparison of the Asteroseismic Mass Scale of Red Clump Giants with Photometric Mass Estimates
• The Bayesian Asteroseismology data Modeling pipeline and its application to $K2$ data

Cited by in corpus (24)

• Spectroscopic age estimates for APOGEE red-giant stars: Precise spatial and kinematic trends with age in the Galactic disc
• The Gaia-ESO Survey: Age-chemical-clock relations spatially resolved in the Galactic disc
• TESS asteroseismology of the Kepler red giants
• Cannibals in the thick disk II -- Radial-velocity monitoring of the young alpha-rich stars
• Revised extinctions and radii for 1.5 million stars observed by APOGEE, GALAH, and RAVE
• Age Determination of Galaxy Merger Remnant Stars using Asteroseismology
• Nature vs. Nurture: Distinguishing Effects from Stellar Processing and Chemical Evolution on Carbon and Nitrogen in Red Giant Stars
• HD-TESS: An Asteroseismic Catalog of Bright Red Giants within TESS Continuous Viewing Zones
• The APO-K2 Catalog. II. Accurate Stellar Ages for Red Giant Branch Stars across the Milky Way
• Mixed Mode Asteroseismology of Red Giant Stars Through the Luminosity Bump
• Mass Matters: No Evidence for Ubiquitous Lithium Production in Low-Mass Clump Giants
• 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
• Multi-campaign Asteroseismic Analysis of eight Solar-like pulsating stars observed by the K2 mission
• The K2 Asteroseismic KEYSTONE sample of Dwarf and Subgiant Solar-Like Oscillators. I: Data and Asteroseismic parameters
• Testing the wavelength dependence of oscillations and granulation in red giants using Kepler and TESS
• A catalogue of asteroseismically calibrated ages for APOGEE DR17. The predictions of a CatBoost machine learning model based on the [Mg/Ce] chemical clock and other stellar parameters
• CN and CO Features: Key Indicators of Red Giant Evolutionary Phase in Moderate-Resolution X-Shooter Spectra
• Assessing the Accuracy of TESS Asteroseismology with APOGEE
• Beyond the Nyquist frequency: Asteroseismic catalog of undersampled Kepler late subgiants and early red giants
• The K2 Galactic Archaeology Program: Overview, target selection and survey properties
• Disentanglement of the chemodynamical assembly: mapping the Milky Way disks
• Asteroseismology of red giants in the globular cluster 47 Tuc using the HST
• The odd bunch: chrono-chemo-dynamics of sixteen unusual stars from Kepler
• Neutron-capture elements record the ordered chemical evolution of the disc over time