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Halo chemistry and first stars. The chemical composition of the matter in the early Galaxy, from C to Mg†
Published online by Cambridge University Press: 01 June 2008
Abstract
From NLTE computations of the magnesium abundance in a sample of extremely metal-poor giants we derive [Mg/Fe]=+0.7, leading to [Al/Mg]=−0.80 and [Na/Mg]=−0.85 in the early Galaxy. The ratio [O/Mg] should be near to the solar value. Measurements of nitrogen abundances derived from the analysis of the NH band in eight more stars confirm the large scatter of the ratios [N/Fe] and [N/O] in the early Galaxy.
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- Contributed Papers
- Information
- Proceedings of the International Astronomical Union , Volume 4 , Issue S254: The Galaxy Disk in Cosmological Context , June 2008 , pp. 349 - 354
- Copyright
- Copyright © International Astronomical Union 2009