Abundances In Very Metal‐Poor Dwarf Stars
Copyright policy )Abundances In Very Metal‐Poor Dwarf Stars
We discuss the detailed composition of 28 extremely metal-poor dwarfs, 22 of which are from the Hamburg/ESO Survey, based on Keck Echelle spectra. Our sample has a median [Fe/H] of -2.7 dex, extends to -3.5 dex, and is somewhat less metal-poor than was expected from [Fe/H](HK,HES) determined from low resolution spectra. Our analysis supports the existence of a sharp decline in the distribution of halo stars with metallicity below [Fe/H] = -3.0 dex. So far no additional turnoff stars with [Fe/H]}
Accepted for publication in the ApJ
- Universität Hamburg Germany
- Uppsala University Sweden
- Carnegie Learning United States
- California Institute of Technology United States
- Hamburger Sternwarte Germany
Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics, 530, 520, Galaxy: abundances — Galaxy: halo — stars: abundances — stars: chemically peculiar — stars: Population II
Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics, 530, 520, Galaxy: abundances — Galaxy: halo — stars: abundances — stars: chemically peculiar — stars: Population II
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