Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lambda Orionis: A 0.02-50 Msun Initial Mass Function   The Lambda Orionis Star Forming Region is dominated by the O8 III star
lambda^1 Ori. Among other structures, it includes a CO and a dust ring whose
diameter is about nine deg, the S264 HII region, a large number of IRAS
sources, the Barnard 30 and 35 dark clouds and a cluster associated with the
central star, the Lambda Ori cluster (Collinder 69). We derive the initial mass
function for this cluster (~5 Myr), covering several orders of magnitude in
mass (50 - 0.02 Msun).

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The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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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: hep-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: math
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The categories of this paper are: plasm-ph