Subaru/HDS studies on elemental abundances of very metal-poor stars

Details Subaru/HDS studies on elemental abundances of very metal-poor stars Subaru/HDS studies on elemental abundances of very metal-poor stars

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003nupha.718...37a&link_type=abstract

Nuclear Physics A, Volume 718, p. 37-44.

Physics

Nuclear Physics

Scientific paper

We review studies of the elemental abundances of very metal-poor stars conducted with the High Dispersion Spectrograph on the 8.2m Subaru Telescope. These include (i) investigations of seven very metal-poor giant stars with relatively high r-process-abundances, which suggest the existence of stars with high Th/Eu ratios, (ii) studies of s-process-element-enhanced, metal-poor stars, indicating the existence of a large (~1 dex) dispersion in the Pb/Ba ratios, and (iii) examination of abundance patterns in carbon-rich, very metal-poor stars, including the extremely iron-poor star CS 29498-043, which exhibits large excesses of C, N, Mg, and Si. The meanings of these findings in the context of nucleosynthesis studies and cosmochronology are discussed.

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