K2 Galactic Archaeology Program DR3, final release Virtual Observatory Resource

Authors
  1. Zinn J.C.
  2. Stello D.
  3. Elsworth Y.
  4. Garcia R.A.
  5. Kallinger T.
  6. Mathur S.,Mosser B.
  7. Hon M.
  8. Bugnet L.
  9. Jones C.
  10. Reyes C.
  11. Sharma S.
  12. Schonrich R.,Warfield J.T.
  13. Luger R.
  14. Vanderburg A.
  15. Kobayashi C.
  16. Pinsonneault M.H.,Johnson J.A.
  17. Huber D.
  18. Buder S.
  19. Joyce M.
  20. Bland-Hawthorn J.,Casagrande L.
  21. Lewis G.F.
  22. Miglio A.
  23. Nordlander T.
  24. Davies G.R.,De Silva G.
  25. Chaplin W.J.
  26. Silva Aguirre V.
  27. Published by
    CDS
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 ~19000 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 ~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 contributions to r-process enrichment from prompt sources associated with, e.g., core-collapse supernovae. With an eye toward other Galactic archeology applications, we characterize K2 GAP DR3 uncertainties and completeness using injection tests, suggesting that K2 GAP DR3 is largely unbiased in mass/age, with uncertainties of 2.9%(stat.)+/-0.1%(syst.) and 6.7%(stat.)+/-0.3%(syst.) in {kappa}R and {kappa}M for red giant branch stars and 4.7%(stat.)+/-0.3%(syst.) and 11%(stat.)+/-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.

Keywords
  1. Asteroseismology
  2. Giant stars
  3. Stellar ages
  4. Metallicity
  5. Optical astronomy
Bibliographic source Bibcode
2022ApJ...926..191Z
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/926/191
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/926/191

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/926/191
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/926/191
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/926/191
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/926/191/table2?
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/926/191/table6?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/926/191/table6?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/926/191/table6?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/926/191/table8?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/926/191/table8?
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History

2023-12-04T13:27:07Z
Resource record created
2023-12-04T13:27:07Z
Created
2023-12-04T15:30:11Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr