Halo chemistry and first stars. The chemical composition of the matter in the early Galaxy, from C to Mg†

Details Halo chemistry and first stars. The chemical composition of the matter in the early Galaxy, from C to Mg† Halo chemistry and first stars. The chemical composition of the matter in the early Galaxy, from C to Mg†

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iaus..254..349s&link_type=abstract

The Galaxy Disk in Cosmological Context, Proceedings of the International Astronomical Union, IAU Symposium, Volume 254. Edited

Mathematics

Logic

Stars: Abundances, Stars: Atmospheres, Stars: Populations Ii, Galaxy:Abundances, Galaxy:Evolution, Nucleosynthesis

Scientific paper

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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