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
- Part III Observations – abundances in extragalactic contexts
- Part IV Stellar populations and mass functions
- Part V Physical processes at high metallicity
- 31 Stellar winds from Solar-metallicity and metal-rich massive stars
- 32 On the determination of stellar parameters and abundances of metal-rich stars
- 33 Are WNL stars tracers of high metallicity?
- 34 The observable metal-enrichment of radiation-driven-plus-wind-blown H II regions in the Wolf–Rayet stage
- 35 Metal-rich A-type supergiants in M31
- Part VI Formation and evolution of metal-rich stars and stellar yields
- Part VII Chemical and photometric evolution beyond Solar metallicity
35 - Metal-rich A-type supergiants in M31
Published online by Cambridge University Press: 02 December 2009
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
- Part III Observations – abundances in extragalactic contexts
- Part IV Stellar populations and mass functions
- Part V Physical processes at high metallicity
- 31 Stellar winds from Solar-metallicity and metal-rich massive stars
- 32 On the determination of stellar parameters and abundances of metal-rich stars
- 33 Are WNL stars tracers of high metallicity?
- 34 The observable metal-enrichment of radiation-driven-plus-wind-blown H II regions in the Wolf–Rayet stage
- 35 Metal-rich A-type supergiants in M31
- Part VI Formation and evolution of metal-rich stars and stellar yields
- Part VII Chemical and photometric evolution beyond Solar metallicity
Summary
We discuss results of an exploratory NLTE analysis of two metal-rich A-type supergiants in M31. Using comprehensive model atoms we derive accurate atmospheric parameters from multiple indicators and show that NLTE effects on the abundance determination can be substantial (altering results by a factor of 2–3). The NLTE analysis removes systematic trends apparent in the LTE approach and reduces statistical uncertainties. Characteristic abundance patterns of the light elements provide empirical constraints on the evolution of metal-rich massive stars.
- Type
- Chapter
- Information
- The Metal-Rich Universe , pp. 332 - 338Publisher: Cambridge University PressPrint publication year: 2008
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