Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Nonradially-Pulsating Primary of the Cataclysmic Variable GW Librae   The dwarf nova GW Librae is the first cataclysmic variable discovered to have
a primary in a white dwarf instability strip, making it the first multi-mode,
nonradially-pulsating star known to be accreting. The primaries of CVs,
embedded in hot, bright accretion discs, are difficult to study directly.
Applying the techniques of asteroseismology to GW Librae could therefore give
us an unprecedented look at a white dwarf that has undergone ~10^9 years of
accretion. However, an accreting white dwarf may have characteristics
sufficiently different from those of single pulsating white dwarfs to render
the standard models of white dwarf pulsations invalid for its study. This paper
presents amplitude spectra of GW Lib from a series of observing campaigns
conducted during 1997, 1998 and 2001. We find that the dominant pulsation modes
cluster at periods near 650, 370 and 230 s, which also appear in linear
combinations with each other. GW Lib's pulsation spectrum is highly unstable on
time-scales of months, and exhibits clusters of signals very closely spaced in
frequency, with separations on the order of a few microHz.

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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: cond-mat
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-th