The Most Metal-Poor Stars. II. Chemical Abundances of 190 Metal-Poor Stars Including 10 New Stars With [Fe/H] < -3.5

Abstract

We present a homogeneous chemical abundance analysis of 16 elements in 190 metal-poor Galactic halo stars (38 program and 152 literature objects). The sample includes 171 stars with [Fe/H] < -2.5, of which 86 are extremely metal poor, [Fe/H] < -3.0. Our program stars include ten new objects with [Fe/H] < -3.5. We identify a sample of "normal" metal-poor stars and measure the trends between [X/Fe] and [Fe/H], as well as the dispersion about the mean trend for this sample. Using this mean trend, we identify objects that are chemically peculiar relative to "normal" stars at the same metallicity. These chemically unusual stars include CEMP-no objects, one star with high [Si/Fe], another with high [Ba/Sr], and one with unusually low [X/Fe] for all elements heavier than Na. The Sr and Ba abundances indicate that there may be two nucleosynthetic processes at lowest metallicity that are distinct from the main r-process. Finally, for many elements, we find a significant trend between [X/Fe] versus Teff which likely reflects non-LTE and/or 3D effects. Such trends demonstrate that care must be exercised when using abundance measurements in metal-poor stars to constrain chemical evolution and/or nucleosynthesis predictions.

Accepted for publication in ApJ

References in corpus (29)

• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• Galactic chemical evolution: Carbon through Zinc
• Nucleosynthetic signatures of the first stars
• Carbon Enhanced Metal-Poor Stars. I. Chemical Compositions of 26 Stars
• First stars VI - Abundances of C, N, O, Li, and mixing in extremely metal-poor giants. Galactic evolution of the light elements
• NLTE line formation of Fe for late-type stars. I. Standard stars with 1D and <3D> model atmospheres
• NLTE line formation of Fe in late-type stars II: 1D spectroscopic stellar parameters
• An extremely primitive halo star
• First Stars VIII -- Enrichment of the neutron-capture elements in the early Galaxy
• Stellar Models and Yields of Asymptotic Giant Branch Stars
• HE 0557-4840 - Ultra-Metal-Poor and Carbon-Rich
• First stars VII. Lithium in extremely metal poor dwarfs
• Atomic Diffusion and Mixing in Old Stars I. VLT/FLAMES-UVES Observations of Stars in NGC 6397
• NLTE abundances of Mn in a sample of metal-poor stars
• The Most Metal-Poor Stars. IV. The Two Populations With [Fe/H] < -3.0
• Chemical similarities between Galactic bulge and local thick disk red giant stars
• New Extremely Metal-Poor Stars in the Galactic Halo
• NLTE determination of the sodium abundance in a homogeneous sample of extremely metal-poor stars
• NLTE determination of the aluminium abundance in a homogeneous sample of extremely metal-poor stars
• Stellar Archaeology -- Exploring the Universe with Metal-Poor Stars
• Carbon-Enhanced Metal-Poor Stars. III. Main-Sequence Turn-Off Stars from the SDSS/SEGUE Sample
• The Most Metal-Poor Stars. III. The Metallicity Distribution Function and CEMP Fraction
• Carbon Stars in the Hamburg/ESO Survey: Abundances
• Chemical Abundance Analysis of the Extremely Metal-Poor Star HE 1300+0157
• The Most Metal-Poor Stars. I. Discovery, Data, and Atmospheric Parameters
• Atomic diffusion and mixing in old stars II. Observations of stars in the globular cluster NGC 6397 with VLT/FLAMES-GIRAFFE
• A New Type of Extremely Metal Poor Star
• Chemical Inhomogeneities in the Milky Way Stellar Halo
• The occurrence of nitrogen-enhanced metal-poor stars: implications for the initial mass function in the early Galactic halo

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