Stellar Abundances in the Solar Neighborhood

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Stellar Abundances in the Solar Neighborhood: The Hypatia Catalog (2014)

In this paper by Hinkel et al, we compile spectroscopic abundance data from 84 literature sources for 50 elements across 3058 stars in the solar neighborhood, within 150 pc of the Sun, to produce the Hypatia Catalog.

We evaluate the variability of the spread in abundance measurements reported for the same star by different surveys. We also explore the likely association of the star within the Galactic disk, the corresponding observation and abundance determination methods for all catalogs in Hypatia, the influence of specific catalogs on the overall abundance trends, and the effect of normalizing all abundances to the same solar scale.

The resulting large number of stellar abundance determinations in the Hypatia Catalog are analyzed only for thin-disk stars with observations that are consistent between literature sources. As a result of our large dataset, we find that the stars in the solar neighborhood may be reveal an asymmetric abundance distribution, such that a [Fe/H]-rich group near to the mid-plane is deficient in Mg, Si, S, Ca, Sc II, Cr II, and Ni as compared to stars further from the plane.

46 elements, 3058 stars

Explore stellar abundance data on 5,986 stars, 347 of which host planets, 72 elements and species, 161 catalogs, and 240,649 abundance measurements at the interactive Hypatia catalog.