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The [O/Fe] Ratio in Halo, Disk and Bulge Stars

Published online by Cambridge University Press:  07 August 2017

B. Barbuy
B. Barbuy*
Affiliation:
IAG-USP, Depto. Astronomia C.P. 9638, SÃo Paulo 01065, Brazil

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The oxygen-to-iron ratio in the different stellar populations is a tracer of the chemical enrichment by supernovae of types II and I: SNII/SNI along the Galaxy lifetime, given that the bulk of oxygen is produced and ejected by massive stars (M > 10 M⊙), whereas the bulk of iron is produced by SNI of intermediate masses. Otherwise, the O overabundances are generally accompanied by α-elements (24Mg, 28Si, 40Ca, 48Ti) overabundances (Wheeler et al, 1989).

Type
I. The Stellar Populations in the Milky Way
Information
Symposium - International Astronomical Union , Volume 149: The Stellar populations of Galaxies , 1992 , pp. 143 - 146
Copyright
Copyright © Kluwer 

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