Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Mass and Extent of the Galactic Halo   We review the various techniques used to constrain the Galactic halo mass
profile for radii > 20 kpc with particular emphasis on identifying a
self-consistent halo model and resolving the apparent discrepancies present in
the literature on this subject. We collate published results and demonstrate
that they are all consistent with a Galactic halo that is nearly isothermal
with a characteristic velocity of 180 to 220 km/sec and an extent >~ 200 kpc.

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The categories of this paper are: stat
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The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
1
The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: nlin