Halo Stars

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May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.6303k&link_type=abstract

American Astronomical Society, 194th AAS Meeting, #63.03; Bulletin of the American Astronomical Society, Vol. 31, p.923

Astronomy and Astrophysics

Astronomy

Scientific paper

The Galactic halo field and the globular clusters contain the oldest known stars, and thus analyses of their metallicities ([Fe/H]) and [el/Fe]-ratios provide important clues to the origin of the chemical elements. Several relevant topics will be touched on in this talk: (1) Variations in the [el/Fe]-ratios among halo stars with metallicities below that of the most metal-poor globular clusters; (2) How reliable are determinations of [el/Fe]-ratios among metal-poor stars? Case in point: [O/Fe] as [Fe/H] declines; (3) Anomalies in the [Ba/Eu]-ratio (or s- to r-process species); (4) Abundance ratios in halo field stars vs globular cluster stars; (5) Use of Fe-surrogates in low-resolution studies.

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