Detailed abundances for 97 metal-poor stars. II. Virtual Observatory Resource

Authors
  1. Ishigaki M.N.
  2. Aoki W.
  3. Chiba M.
  4. Published by
    CDS
Abstract

We present chemical abundance analyses of sodium, iron-peak, and neutron-capture elements for 97 kinematically selected thick disk, inner halo, and outer halo stars with metallicities -3.3<[Fe/H]<-0.5. The main aim of this study is to examine chemical similarities and differences among metal-poor stars belonging to these old Galactic components as a clue to determine their early chemodynamical evolution. In our previous paper, we obtained abundances of {alpha} elements by performing a one-dimensional LTE abundance analysis based on the high-resolution (R~50000) spectra obtained with the Subaru/HDS. In this paper, a similar analysis is performed to determine abundances of an additional 17 elements. We show that, in metallicities below [Fe/H]~-2, the abundance ratios of many elements in the thick disk, inner halo, and outer halo subsamples are largely similar. In contrast, in higher metallicities ([Fe/H]>~-1.5), differences in some of the abundance ratios among the three subsamples are identified. Specifically, the [Na/Fe], [Ni/Fe], [Cu/Fe], and [Zn/Fe] ratios in the inner and outer halo subsamples are found to be lower than those in the thick disk subsample.

Keywords
  1. chemical-abundances
  2. halo-stars
  3. milky-way-galaxy
  4. line-intensities
Bibliographic source Bibcode
2013ApJ...771...67I
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https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/771/67
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/771/67
Document Object Identifer DOI
doi:10.26093/cds/vizier.17710067

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History

2015-02-03T08:16:35Z
Resource record created
2015-02-03T08:16:35Z
Created
2017-12-07T07:27:17Z
Updated

Contact

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CDS support team
Postal Address
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