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Abundances of Heavy Elements in the Magellanic Clouds

Published online by Cambridge University Press:  19 July 2016

Stephen C. Russell ,
Michael S. Bessell  and
Michael A. Dopita
Stephen C. Russell
Affiliation:
Mount Stromlo and Siding Spring Observatories Private Bag PO Woden ACT 2611 Australia
Michael S. Bessell
Affiliation:
Mount Stromlo and Siding Spring Observatories Private Bag PO Woden ACT 2611 Australia
Michael A. Dopita
Affiliation:
Mount Stromlo and Siding Spring Observatories Private Bag PO Woden ACT 2611 Australia

Abstract

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This paper provides the first reliable determination of the iron abundance of the Magellanic Clouds. There is clear evidence for carbon and nitrogen depletion, with respect to iron, in the Clouds which can be explained by the relative youth of the Clouds compared to our own Galaxy. Oxygen depletion relative to iron is also in evidence and it is suggested here that this is due to preferential loss of ejecta from high mass stars. Finally, our discovery of an extremely low abundance star in the SMC, coupled with the identification of a similar star by Spite et al. (1987), calls in to question whether or not the SMC is indeed a well mixed system as previously assumed.

Type
VI. Chemical Composition of Stars
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 545 - 550
Copyright
Copyright © Kluwer 1988 

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