Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mg, Al, Si, Ca, Ti, Fe, and Ni abundance for a sample of solar analogues   We report on the determination of chemical abundances of 38 solar analogues,
including 11 objects previously identified as super metal-rich stars. We have
measured the equivalent widths for 34 lines of 7 different chemical elements
(Mg, Al, Si, Ca, Ti, Fe, and Ni) in high-resolution ($\mathcal{R} \sim
80\,000$) spectroscopic images, obtained at the Observatorio Astrof\'isico
Guillermo Haro (Sonora, Mexico), with the Cananea High-resolution Spectrograph.
We derived chemical abundances using ATLAS12 model atmospheres and the Fortran
code MOOG. We confirmed the super metallicity status of 6 solar analogues.
Within our sample, BD+60 600 is the most metal-rich star ([Fe/H]=+0.35 dex),
while for HD 166991 we obtained the lowest iron abundance ([Fe/H]=$-0.53$ dex).
We also computed the so-called [Ref] index for 25 of our solar analogues, and
we found, that BD+60 600 ([Ref]=+0.42) and BD+28 3198 ([Ref]=+0.34) are good
targets for exoplanet search.

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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph