The metal-poor end of the Spite plateau

The metal-poor end of the Spite plateau

Context. The primordial nature of the Spite plateau is at odds with the WMAP satellite measurements, implying a primordial Li production at least three times higher than observed. It has also been suggested that A(Li) might exhibit a positive correlation with metallicity below [Fe/H]  ~  −2.5. Previ...

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Veröffentlicht in:Astronomy and astrophysics (Berlin) 2010-11, Vol.522
Hauptverfasser: Sbordone, L., Bonifacio, P., Caffau, E., Ludwig, H.-G., Behara, N. T., González Hernández, J. I., Steffen, M., Cayrel, R., Freytag, B., Van’t Veer, C., Molaro, P., Plez, B., Sivarani, T., Spite, M., Spite, F., Beers, T. C., Christlieb, N., François, P., Hill, V.
Format: Artikel
Sprache:eng
Schlagworte:
abundances
cosmology: observations
Galaxy: abundances
Galaxy: halo
nuclear reactions
nucleosynthesis
stars: Population II
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Zusammenfassung:Context. The primordial nature of the Spite plateau is at odds with the WMAP satellite measurements, implying a primordial Li production at least three times higher than observed. It has also been suggested that A(Li) might exhibit a positive correlation with metallicity below [Fe/H]  ~  −2.5. Previous samples studied comprised few stars below [Fe/H] =  −3. Aims. We present VLT-UVES Li abundances of 28 halo dwarf stars between [Fe/H] =  −2.5 and  −3.5, ten of which have [Fe/H]  
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361/200913282