Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First Dredge-Up and further Mixing Mechanisms along the Red Giant Branch
  in Field Stars   In this research we use a large sample of field metal-poor stars ([Fe/H]<-1)
in different evolutionary phases to prove observationally that (small mass)
subgiants (stars brighter than the first dredge-up and fainter than the RGB
bump) have abundances of light elements in agreement with predictions from
classical evolutionary models. A further mixing episode occurs just after the
RGB bump, in agreement with the predictions by Charbonnel (1994, A&A, 282, 811;
1995, ApJ, 453, L41) The O-Na anti-correlation, typical signature observed
amongst globular cluster giants, is not present amongst field stars.

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The categories of this paper are: adap-org
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The categories of this paper are: q-alg
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: cs
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th