Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A New Method for the Asteroseismic Determination of the Evolutionary
  State of Red-Giant Stars   Determining the ages of red-giant stars is a key problem in stellar
astrophysics. One of the difficulties in this determination is to know the
evolutionary state of the individual stars -- i.e. have they started to burn
Helium in their cores? That is the topic of this paper. Asteroseismic data
provide a route to achieving this information. What we present here is an
highly autonomous way of determining the evolutionary state from an analysis of
the power spectrum of the light curve. The method is fast and efficient and can
provide results for a large number of stars. It uses the structure of the
dipole-mode oscillations, which have a mixed character in red-giant stars, to
determine some measures that are used in the categorisation. It does not
require that all the individual components of any given mode be separately
characterised. Some 6604 red giant stars have been classified. Of these 3566
are determined to be on the red-giant branch, 2077 are red-clump and 439 are
secondary-clump stars. We do not specifically identify the low metallicity,
horizontal-branch stars. The difference between red-clump and secondary-clump
stars is dependent on the manner in which Helium burning is first initiated. We
discuss that the way the boundary between these classifications is set may lead
to mis-categorisation in a small number of stars. The remaining 522 stars were
not classified either because they lacked sufficient power in the dipole modes
(so-called depressed dipole modes) or because of conflicting values in the
parameters.

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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph