Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Re-examining the Radial Distributions of M13 Multiple Populations   We seek to resolve the tension in the literature regarding the presence of
radially segregated multiple populations in Galactic globular cluster M13.
Previous studies of this nearby cluster have presented discordant results about
the degree of dynamical mixing in M13's inner region. Using ground-based (UBVI)
photometry, we show that cumulative radial distributions of stars on the blue
and red sides of the red giant branch are statistically identical.
Interestingly, these results are obtained using data from large-aperture,
ground-based telescopes as well as a more modestly-sized instrument, and both
are in agreement with previous work done using HST and Stromgren photometry.
Results are derived using the C_{U,B,I} index, shown to be sensitive to
compositional differences. We discuss our conclusions that the chemically
distinct populations within M13 may be dynamically mixed in the context of
published results from simulations.

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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ph