Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Behaviour of Pulsations in Hydrodynamic Models of Massive Stars   We have calculated the pulsations of massive stars using a nonlinear
hydrodynamic code including time-dependent convection. The basic structure
models are based on a standard grid published by Meynet et al. (1994). Using
the basic structure, we calculated envelope models, which include the outer few
percent of the star. These models go down to depths of at least 2 million K.
These models, which range from 40 to 85 solar masses, show a range of pulsation
behaviours. We find models with very long period pulsations ( $>$ 100 d),
resulting in high amplitude changes in the surface properties. We also find a
few models that show outburst-like behaviour. The details of this behaviour are
discussed, including calculations of the resulting wind mass-loss rates.

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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: physics
5
The categories of this paper are: gr-qc