Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Brown Dwarf Mass Function from Pixel Microlensing   We argue that gravitational microlensing is a feasible technique for
measuring the mass function of brown dwarf stars in distant galaxies.
Microlensing surveys of the bulge of M31, and of M87 in the Virgo cluster, may
provide enough events to differentiate the behaviour of the mass function of
lenses below the hydrogen burning limit (though we find that M87 is a more
favourable target). Such objects may provide a significant supply of baryonic
dark matter, an interesting possibility for the study of galactic dynamics.
Furthermore, these systems have different metallicities than the solar
neighbourhood, which may affect the mass function. These considerations are
relevant in the context of star formation studies.

3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
16
The categories of this paper are: stat
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: math