Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determining element abundances of [WC]-type Central Stars for probing
  stellar evolution and nucleosynthesis   [WC]-type CSPNs are hydrogen-deficient Central Stars of Planetary Nebulae
showing strong stellar winds and a carbon-rich chemistry. We have analyzed new
high-resolution spectra of [WC]-type CSPNs with the Potsdam Wolf-Rayet (PoWR)
non-LTE expanding atmosphere models, using upgraded model atoms and atomic
data. Previous analyses are repeated on the basis of the current models which
account for iron-line blanketing. We especially focus on determining the
chemical composition, including some trace elements like nitrogen which are of
key importance for understanding the evolutionary origin of the
hydrogen-deficient Central Stars.

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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: stat
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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: solv-int