Abundances of Extremely Metal-Poor Stars, aNnew HIRES Sample

Details Abundances of Extremely Metal-Poor Stars, aNnew HIRES Sample Abundances of Extremely Metal-Poor Stars, aNnew HIRES Sample

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.9302l&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #93.02; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present the results of an abundance analysis for a sample of stars with -2>[Fe/H]> -4. The set includes 29 stars, with effective temperature ranging from 4800 K to 6300 K. The data were obtained with the HIRES spectrograph at Keck Observatory. For most objects our wavelength range reaches from about 3100 angstroms to 5800 angstroms. Our spectra allow us to further constrain the abundance scatter at low metallicities for the light elements including carbon and nitrogen, up through the iron group, and for many neutron-capture elements. Most of our objects have come from the Beers et al. HK survey (1992, AJ, 103, 1987) for metal-poor stars, and for many of them this is the first high-resolution study.
This research is based on work supported by the National Science Foundation under the grant AST-0607770.

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