Trends and Scatter of Abundance Ratios for Metal-poor Turnoff Stars

Details Trends and Scatter of Abundance Ratios for Metal-poor Turnoff Stars Trends and Scatter of Abundance Ratios for Metal-poor Turnoff Stars

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..336...55n&link_type=abstract

Cosmic Abundances as Records of Stellar Evolution and Nucleosynthesis in honor of David L. Lambert, ASP Conference Series, Vol.

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Trends and scatter of abundances of Li, O, Ca and Fe in metal-poor stars are discussed with particular emphasis on new results obtained by analyzing high resolution ESO VLT/UVES spectra of 23 turnoff stars using effective temperatures derived from the Hα line. Evidence of a significant cosmic scatter in O/Fe and Ca/Fe at a given metallicity is found, whereas the scatter in Li/H is very small, i.e. less than 0.03 dex. The results are compared to previous data for halo, thick and thin disk stars, and to the prediction of the primordial Li abundance from WMAP.

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