r-process peaks elements in HD 160617 Virtual Observatory Resource

Authors
  1. Roederer I.U.
  2. Lawler J.E.
  3. Published by
    CDS
Abstract

We report the first detection of elements at all three r-process peaks in the metal-poor halo star HD 160617. These elements include arsenic and selenium, which have not been detected previously in halo stars, and the elements tellurium, osmium, iridium, and platinum, which have been detected previously. Absorption lines of these elements are found in archive observations made with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope. We present up-to-date absolute atomic transition probabilities and complete line component patterns for these elements. Additional archival spectra of this star from several ground-based instruments allow us to derive abundances or upper limits of 45 elements in HD 160617, including 27 elements produced by neutron-capture reactions. The average abundances of the elements at the three r-process peaks are similar to the predicted solar system r-process residuals when scaled to the abundances in the rare earth element domain. This result for arsenic and selenium may be surprising in light of predictions that the production of the lightest r-process elements generally should be decoupled from the heavier r-process elements.

Keywords
  1. Atomic physics
  2. Line intensities
  3. Chemically peculiar stars
  4. Halo stars
Bibliographic source Bibcode
2012ApJ...750...76R
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/750/76
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/750/76
Document Object Identifer DOI
doi:10.26093/cds/vizier.17500076

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History

2014-01-20T13:16:03Z
Resource record created
2014-01-20T13:16:03Z
Created
2014-02-10T14:49:55Z
Updated

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
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