Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A detailed study of the enigmatic cluster M82F   We present a detailed study of the stellar cluster M82F, using multi-band
high resolution HST imaging and deep ground based optical slit and integral
field spectroscopy. Using the imaging we create colour maps of the cluster and
surrounding region in order to search for substructure. We find a large amount
of substructure, which we interpret as the result of differential extinction
across the projected face of the cluster. With this interpretation, we are able
to construct a spatially resolved extinction map across the cluster which is
used to derive the intrinsic flux distribution. Fitting cluster profiles (King
and EFF) to the intrinsic images we find that the cluster is 15-30% larger than
previous estimates, and that no strong evidence of mass segregation in this
cluster exists. Using the optical spectra, we find that the age of M82F is
60-80 Myr and from its velocity conclude that the cluster is not physically
associated with a large HII region that it is projected upon, both in agreement
with previous studies. The reconstructed integral field maps show that that
majority of the line emission comes from a nearby HII region. The spatial
dependence of the line widths (implying the presence of multiple
components)measured corresponds to the extinction map derived from photometry,
indicating that the gas/dust clouds responsible for the extinction are also
partially ionised. Even with the wealth of observations presented here, we do
not find a conclusive solution to the problem of the high light-to-mass ratio
previously found for this cluster and its possible top-heavy stellar IMF.

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The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: q-alg