Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The incidence of nonradial pulsation in the lambda Bootis stars   We have completed a high-resolution, high-signal-to-noise, spectroscopic
survey of the northern members of the peculiar lambda Boo stars in order to
investigate the frequency of the incidence of nonradial pulsation (NRP) in
these metal-deficient stars. Of 18 objects observed, 9 show conclusive evidence
of NRP, which suggests that pulsation instability is a common phenomenon in the
lambda Boo class.

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The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th