Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- Part I Abundances in the Galaxy: field stars
- Part II Abundances in the Galaxy: Galactic stars in clusters, bulges and the centre
- 9 Galactic open clusters with supersolar metallicities
- 10 Old and very-metal-rich open clusters in the BOCCE project
- 11 Massive-star versus nebular abundances in the Orion nebula
- 12 Abundance surveys of metal-rich bulge stars
- 13 Metal abundances in the Galactic Center
- 14 Light elements in the Galactic bulge
- 15 Metallicity and ages of selected G–K giants
- Part III Observations – abundances in extragalactic contexts
- Part IV Stellar populations and mass functions
- Part V Physical processes at high metallicity
- Part VI Formation and evolution of metal-rich stars and stellar yields
- Part VII Chemical and photometric evolution beyond Solar metallicity
13 - Metal abundances in the Galactic Center
Published online by Cambridge University Press: 02 December 2009
- Frontmatter
- Contents
- List of contributors
- Preface
- Part I Abundances in the Galaxy: field stars
- Part II Abundances in the Galaxy: Galactic stars in clusters, bulges and the centre
- 9 Galactic open clusters with supersolar metallicities
- 10 Old and very-metal-rich open clusters in the BOCCE project
- 11 Massive-star versus nebular abundances in the Orion nebula
- 12 Abundance surveys of metal-rich bulge stars
- 13 Metal abundances in the Galactic Center
- 14 Light elements in the Galactic bulge
- 15 Metallicity and ages of selected G–K giants
- Part III Observations – abundances in extragalactic contexts
- Part IV Stellar populations and mass functions
- Part V Physical processes at high metallicity
- Part VI Formation and evolution of metal-rich stars and stellar yields
- Part VII Chemical and photometric evolution beyond Solar metallicity
Summary
Thanks to the impressive evolution of IR detectors and the new generation of line-blanketed models for the extended atmospheres of hot stars we are able to derive accurately the physical properties and metallicity estimates of massive stars. Here, we review quantitative spectroscopic studies of massive stars in the three Galactic Center clusters: the Quintuplet, Arches, and Central clusters. Our analysis of the LBVs for the Quintuplet cluster provides a direct estimate of chemical abundances of α-elements and Fe in these objects. For the Arches cluster, we introduce a method based on the N abundance of WNL stars and the theory of evolution of massive stars. For the Central cluster, new observations reveal IRS8 to be an outsider with respect to the rest of the massive stars in the cluster in terms of both age and location. Using the derived properties of IRS8, we present a new method by which to derive metallicity from the O iii feature at 2.115 µm. Our results indicate that the three clusters have Solar metallicity.
- Type
- Chapter
- Information
- The Metal-Rich Universe , pp. 112 - 125Publisher: Cambridge University PressPrint publication year: 2008