Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On mode trapping in pulsating DA white dwarf stars   The present work is designed to explore the effects of the time-dependent
element diffusion on the mode trapping properties of DA white dwarf models with
various thickness of the hydrogen envelope. Our predictions are compared with
the standard assumption of diffusive equilibrium in the trace element
approximation. We find that element diffusion markedly weakens the presence of
mode trapping originated in the outer layers of the models, even for the case
of thin hydrogen envelopes.

27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys