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α-elements in mildly metal-poor stars

Published online by Cambridge University Press:  23 December 2005

H. Decauwer ,
E. Jehin ,
G. Parmentier  and
P. Magain
H. Decauwer
Affiliation:
AGO (B5c), University of Liège, B-4000 Liège, Belgium – email: [email protected]
E. Jehin
Affiliation:
ESO, Casilla 19001, Alonso de Cordova 3107, Vitacura, Santiago, Chile
G. Parmentier
Affiliation:
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
P. Magain
Affiliation:
AGO (B5c), University of Liège, B-4000 Liège, Belgium – email: [email protected]
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Abstract

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Accurate relative abundances of light elements (C to Ca) have been obtained in a sample of mildly metal-poor stars (Decauwer et al. 2005). Combined with the results of a previous study (Jehin et al. 1999), we find different slopes in the correlations between the different α-elements. These results can be explained by postulating that the stars exhibiting lower than average α/Fe form in low mass clouds, unable to sustain the formation of very massive stars.

Keywords

Stars: abundancesGalaxy: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 393 - 394
Copyright
© 2005 International Astronomical Union