Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The solitary g-mode frequencies in early B-type stars   We present possible explanations of pulsations in early B-type main sequence
stars which arise purely from the excitation of gravity modes. There are three
stars with this type of oscillations detected from the BRITE light curves:
$\kappa$ Cen, a Car, $\kappa$ Vel. We show that by changing metallicity or the
opacity profile it is possible in some models to dump pressure modes keeping
gravity modes unstable. Other possible scenario involves pulsations of a lower
mass companion.

31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
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The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th