Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Halo Pairs in the Millennium Simulation: Love & Deception   In this work I investigate the statistical properties of a huge catalog of
closely interacting pairs of dark matter haloes, extracted from the Millennium
Simulation database. Only haloes that reach a minimum mass greater than 8.6
\times 10^10 Msun/h (corresponding to 100 particles) are considered. Close
pairs are selected if they come within a critical distance dcrit. I explore the
effects of replacing dcrit = 1 Mpc/h with 200 kpc/h on the evolution of
separations, lifetimes, total masses and mass ratios of these pairs.

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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: adap-org