Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: S4N: A Spectroscopic Survey of Stars in the Solar Neighborhood   [ABRIDGED] We report the results of a high-resolution spectroscopic survey of
all the stars more luminous than Mv = 6.5 mag within 14.5 pc from the Sun. We
derive stellar parameters and perform a preliminary abundance and kinematic
analysis of the F-G-K stars in the sample. The inferred metallicity ([Fe/H])
distribution is centered at about -0.1 dex, and shows a standard deviation of
0.2 dex.
  We identify a number of metal-rich K-type stars which appear to be very old,
confirming the claims for the existence of such stars in the solar
neighborhood. With atmospheric effective temperatures and gravities derived
independently of the spectra, we find that our classical LTE model-atmosphere
analysis of metal-rich (and mainly K-type) stars provides discrepant abundances
from neutral and ionized lines of several metals. Based on transitions of
majority species, we discuss abundances of 16 chemical elements.
  In agreement with earlier studies we find that the abundance ratios to iron
of Si, Sc, Ti, Co, and Zn become smaller as the iron abundance increases until
approaching the solar values, but the trends reverse for higher iron
abundances. At any given metallicity, stars with a `low' galactic rotational
velocity tend to have high abundances of Mg, Si, Ca, Sc, Ti, Co, Zn, and Eu,
but low abundances of Ba, Ce, and Nd. The Sun appears deficient by roughly 0.1
dex in O, Si, Ca, Sc, Ti, Y, Ce, Nd, and Eu, compared to its immediate
neighbors with similar iron abundances.

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The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat