Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21940503h&link_type=abstract
American Astronomical Society, AAS Meeting #219, #405.03
Astronomy and Astrophysics
Astronomy
Scientific paper
I have compiled spectroscopic abundance determinations for 44 elements across 1224 stars within 160 pc of the Sun from literature sources to produce the Hypatia Catalog. The goal of the Hypatia Catalog is to examine nearby stars and regions in the solar neighborhood for chemical abundance trends, specifically those enhanced with bio-essential elements, namely: C, N, O, Mg, Si, S, and Fe, for additional information in the search for exoplanets. Hypatia is based upon The Catalog of Nearby Habitable Stellar Systems, or stars in the solar neighborhood that could potentially host habitable exoplanets, depending on stellar distances, variability, multiplicity, kinematics, and spectral classification. I find that the element abundance maps of Hypatia stars suggest [1] stars in the solar neighborhood are consistent with solar abundances, [2] the evolutionary history of each element is consistent with mean chemical evolution models, [3] there are no significant statistical correlations in the abundances with respect to position, radial distance, or velocity - suggesting the solar neighborhood is well mixed, [4] possible confirmation of trends known to be found in the abundances of verified exoplanet hosts, and [5] there are ``habitability windows'' located on the sky at (20.6h, -4.8o) and (22.6h, -48.5o) that exhibit enhanced abundances of bio-essential elements which may be of use in targeted or beamed searches.
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