Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: About the chemical composition of delta Scuti - the prototype of the
  class of pulsating variables   We present chemical abundances in the photosphere of $\delta$ Scuti -- the
prototype of the class of pulsating variables -- determined from the analysis
of a spectrum obtained at Terskol observatory 2 meter telescope with resolution
$R=52,000$, signal to noise ratio 250. VLT and IUE spectra were used also .
Abundance pattern of \dsct consists of 49 chemical elements. The abundances of
Be, P, Ge, Nb, Mo, Ru, Er, Tb, Dy, Tm, Yb, Lu, Hf, Ta, Os, Pt, Th were not
investigated previously. The lines of third spectra of Pr and Nd also are
investigated for the first time. The abundances of heavy elements show the
overabundances with respect to the Sun up to 1 dex. The abundance pattern of
\dsct is similar to that of Am-Fm stars.

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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con