Logo image
Se connecter
Retour
Halo chemistry and first stars. The chemical composition of the matter in the early Galaxy, from C to Mg
Acte de colloque   Avec comité de lecture

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

Monique Spite, Piercarlo Bonifacio, Roger Cayrel, François Spite, Patrick François, Hans-Günter Ludwig, Elisabetta Caffau, Sergei Andrievsky, Beatriz Barbuy, Bertrand Plez, …
IAU Symposium, Vol.254(S254), pp.349-354
The Galaxy Disk in Cosmological Context, IAU Symposium 254
01/06/2008
DOI: https://doi.org/10.1017/S1743921308027804

Résumé

Astrophysics Physics
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.

Indicateurs

1 Consultations de la notice

Détails

Logo image