Abundance patterns in stars in the bulge and Galactic center

Katia Cunha, V. V. Smith, K. Sellgren, R. D. Blum, S. V. Ramírez, D. M. Terndrup

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We discuss oxygen and iron abundance patterns in K and M red-giant members of the Galactic bulge and in the young and massive M-type stars inhabiting the very center of the Milky Way. The abundance results from the different bulge studies in the literature, both in the optical and the infrared, indicate that the [O/Fe]-[Fe/H] relation in the bulge does not follow the disk relation, with [O/Fe] values falling above those of the disk. Based on these elevated values of [O/Fe] extending to large Fe abundances, it is suggested that the bulge underwent a rapid chemical enrichment with perhaps a top-heavy initial mass function. The Galactic Center stars reveal a nearly uniform and slightly elevated (relative to solar) iron abundance for a studied sample which is composed of 10 red giants and supergiants. Perhaps of more significance is the fact that the young Galactic Center M-type stars show abundance patterns that are reminiscent of those observed for the bulge population and contain enhanced abundance ratios of -elements relative to either the Sun or Milky Way disk at near-solar metallicities.

Original languageEnglish (US)
Pages (from-to)339-342
Number of pages4
JournalProceedings of the International Astronomical Union
Issue numberS245
StatePublished - Jul 2007
Externally publishedYes


  • Nucleosynthesis stars: abundances Galaxy: center Galaxy: bulge

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


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