Stellar twins in RAVE with Gaia Virtual Observatory Resource

Authors
  1. Jofre P.
  2. Traven G.
  3. Hawkins K.
  4. Gilmore G.
  5. Sanders J.L.
  6. Madler T.,Steinmetz M.
  7. Kunder A.
  8. Kordopatis G.
  9. McMillan P.
  10. Bienayme O.,Bland-Hawthorn J.
  11. Gibson B.K.
  12. Grebel E.K.
  13. Munari U.
  14. Navarro J.,Parker Q.
  15. Reid W.
  16. Seabroke G.
  17. Zwitter T.
  18. Published by
    CDS
Abstract

We apply the twin method to determine parallaxes to 232 545 stars of the RAVE survey using the parallaxes of Gaia DR1 as a reference. To search for twins in this large data set, we apply the t-student stochastic neighbour embedding projection that distributes the data according to their spectral morphology on a two-dimensional map. From this map, we choose the twin candidates for which we calculate a {chi}^2^ to select the best sets of twins. Our results show a competitive performance when compared to other model-dependent methods relying on stellar parameters and isochrones. The power of the method is shown by finding that the accuracy of our results is not significantly affected if the stars are normal or peculiar since the method is model free. We find twins for 60 per cent of the RAVE sample that are not contained in Tycho-Gaia Astrometric Solution (TGAS) or that have TGAS uncertainties that are larger than 20 per cent. We could determine parallaxes with typical errors of 28 per cent. We provide a complementary data set for the RAVE stars not covered by TGAS, or that have TGAS uncertainties which are larger than 20 per cent, with model-free parallaxes scaled to the Gaia measurements.

Keywords
  1. Globular star clusters
  2. Multiple stars
  3. Optical astronomy
  4. Trigonometric parallax
Bibliographic source Bibcode
2017MNRAS.472.2517J
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/472/2517
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/472/2517
Document Object Identifer DOI

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/472/2517
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/472/2517
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/472/2517
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/472/2517/tablea1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/472/2517/tablea1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/472/2517/tablea1?

History

2020-08-11T10:09:40Z
Resource record created
2020-08-11T10:09:40Z
Created
2021-09-07T12:08:14Z
Updated

Contact

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