Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Line profile analysis of the Delta Scuti star HD2724=BB Phe: mode
  identification and amplitude variations   The line profile variations of the Delta Scuti star HD 2724=BB Phe were
studied on the basis of new 189 high-resolution spectrograms covering 52 hours
of observations on a baseline of 8.3 days. By combining these results with
those of a previous campaign 13 pulsation modes were identified: 5 of them are
both photometric and spectroscopic, 3 are purely spectroscopic and 5 purely
photometric. For the first time it was possible to compare spectroscopic data
taken in two different seasons: 6 modes were found to be common to both
datasets and furthermore strong amplitude variations of the excited modes were
detected. The fit of the line profile variations with a model of non-radial
pulsating star allowed us to obtain a reasonable estimate of the inclination of
the rotational axis and to propose the l,m typing of the spectroscopic modes.
The frequency content resembles that of 4 CVn, a delta Sct star with similar
physical parameters.

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The categories of this paper are: atom-ph
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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: comp-gas
7
The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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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: cs
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th