Abundances of M22 subgiants Virtual Observatory Resource

Authors

1. Marino A.F.
2. Milone A.P.
3. Sneden C.
4. Bergemann M.
5. Kraft R.P.,Wallerstein G.
6. Cassisi S.
7. Aparicio A.
8. Asplund M.
9. Bedin R.L.
10. Hilker M.,Lind K.
11. Momany Y.
12. Piotto G.
13. Roederer I.U.
14. Stetson P.B.
15. Zoccali M.

Published by

CDS

Abstract

We present an abundance analysis of 101 subgiant branch (SGB) stars in the globular cluster M22. Using low-resolution FLAMES/GIRAFFE spectra we have determined abundances of the neutron-capture strontium and barium and the light element carbon. With these data we explore relationships between the observed SGB photometric split in this cluster and two stellar groups characterized by different contents of iron, slow neutron-capture process (s-process) elements, and the {alpha} element calcium, which we previously discovered in M22's red-giant stars.

Keywords

1. globular-star-clusters
2. giant-stars
3. chemical-abundances

Bibliographic source Bibcode

2012A&A...541A..15M

See also HTML

https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/541/A15

IVOA Identifier IVOID

ivo://CDS.VizieR/J/A+A/541/A15

Document Object Identifer DOI

doi:10.26093/cds/vizier.35410015

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