Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Combined stellar structure and atmosphere models for massive stars:
  Revised ionising fluxes for O stars   We present the EUV fluxes derived from the recent "combined stellar structure
and atmosphere models" (CoStar models). The atmosphere models in particular
account for the stellar wind and include non-LTE effects and line blanketing.
We provide an extensive set of calculations from tracks between 20 and 120 Msun
at Z=0.02 (solar metallicity) and Z=0.004. They cover the entire parameter
space of O3--B0 stars of all luminosity classes. Model uncertainties are
discussed in the light of recent EUV and X-ray observations. We show the
importance of using adequate O star ionising fluxes for the interpretation of
HII regions, young starbursts and related objects.

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The categories of this paper are: cond-mat
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The categories of this paper are: hep-th
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The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
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The categories of this paper are: cs
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph