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Abundance analysis of six LMC F supergiants

Published online by Cambridge University Press:  19 July 2016

Andrew McWilliam  and
Robert E. Williams
Andrew McWilliam
Affiliation:
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile
Robert E. Williams
Affiliation:
Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile

Abstract

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We have performed an abundance analysis of six Large Magellanic Cloud (LMC) F supergiants, based on infrared photometry and echelle spectra obtained from CTIO. We find a real dispersion in Fe/H values, indicating that the LMC is inhomogeneous. Oxygen abundances appear to be equal in all six stars, resulting in a steep O/Fe slope with Fe/H. Other element abundances appear near normal, although there is a hint of a small enhancement of second s-process peak elements. Iron abundances are probably affected by non-LTE; this does not change our conclusions concerning oxygen.

Type
Stellar Evolution
Information
Symposium - International Astronomical Union , Volume 148: The Magellanic Clouds , 1991 , pp. 391 - 392
Copyright
Copyright © Kluwer 1991 

References

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