Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure and stellar content analysis of the open cluster M11 with
  2MASS photometry   An overall analysis of the structure and stellar content of M11 is presented,
thanks to the wide-angle 2MASS spatial coverage. We derive photometric and
structural parameters and discuss the spatial dependance of the luminosity and
mass functions. Photometric parameters basically agree with previous ones
mostly based on the optical. We obtained a core radius of 1.23pc and a tidal
radius of 29pc. In particular, the cluster is populous enough so that the tidal
radius could be obtained by fitting the three-parameter King profile to the
radial distribution of stars. We analyzed the spatial distribution of mass
functions, finding that the the slope changes from -0.73 in the core to +2.88
in the outer halo. The spatial distribution of mass function slopes derived
from 2MASS agrees with that derived from optical CCD data, which further
confirms the reliability of 2MASS data for future analyses of this kind at
comparable observational limits. We detect mass segregation up to distances
from the center of ~20arcmin. We emphasize that the mass function slope in the
core is flatter than anywhere else as a consequence of mass segregation. The
derived total cluster mass is ~11000 solar masses.

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The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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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: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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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: math
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ph