Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Substructure-Alignment Connection   Using a sample of 903 APM clusters we investigate whether their dynamical
status, as evidenced by the presence of significant substructures, is related
to the large-scale structure of the Universe. We find that the cluster
dynamical activity is strongly correlated with the tendency of clusters to be
aligned with their nearest neighbour and in general with the nearby clusters
that belong to the same supercluster. Furthermore, dynamically active clusters
are more clustered than the overall cluster population. These are strong
indications that clusters develop in a hierarchical fashion by anisotropic
merging along the large-scale filaments within which they are embedded.

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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
3
The categories of this paper are: physics
19
The categories of this paper are: eess
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The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
1
The categories of this paper are: cs
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org