RAVE J203843.2-002333 high-resolution spectroscopy Virtual Observatory Resource

Authors
  1. Placco V.M.
  2. Holmbeck E.M.
  3. Frebel A.
  4. Beers T.C.
  5. Surman R.A.
  6. Ji A.P.,Ezzeddine R.
  7. Points S.D.
  8. Kaleida C.C.
  9. Hansen T.T.
  10. Sakari C.M.,Casey A.R.
  11. Published by
    CDS
Abstract

We report the discovery of RAVE J203843.2-002333, a bright (V=12.73), very metal-poor ([Fe/H]=-2.91), r-process-enhanced ([Eu/Fe]=+1.64 and [Ba/Eu]=-0.81) star selected from the RAVE survey. This star was identified as a metal-poor candidate based on its medium-resolution (R~1600) spectrum obtained with the KPNO/Mayall Telescope, and followed up with high-resolution (R~66000) spectroscopy with the Magellan/Clay Telescope, allowing for the determination of elemental abundances for 24 neutron-capture elements, including thorium and uranium. RAVE J2038-0023 is only the fourth metal-poor star with a clearly measured U abundance. The derived chemical abundance pattern exhibits good agreement with those of other known highly r-process- enhanced stars, and evidence suggests that it is not an actinide-boost star. Age estimates were calculated using U/X abundance ratios, yielding a mean age of 13.0+/-1.1Gyr.

Keywords
  1. chemically-peculiar-stars
  2. chemical-abundances
  3. line-intensities
Bibliographic source Bibcode
2017ApJ...844...18P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/844/18
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/844/18
Document Object Identifer DOI
doi:10.26093/cds/vizier.18440018

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/844/18
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/844/18
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/844/18
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).

History

2018-04-03T10:21:10Z
Resource record created
2018-04-03T10:21:10Z
Created
2018-05-16T07:04:37Z
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