Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weighing Superclusters   We present a summary report on a detailed study of the mass and dynamical
state of the Corona Borealis supercluster using the largest redshift survey of
this object to date. Extensive $N$-body experiments are performed on simulated
superclusters in both critically-flat and low-density cosmological models to
test the robustness and errors of the mass estimators used on the data. From
the redshifts and dynamics of 528 galaxies in the supercluster, the mass of
Corona Borealis is estimated to be at least $3\times 10^{16} h^{-1} M_\odot$,
and the mass-to-light ratio is $560 h (M/L)_\odot$, yielding a matter density
parameter of $\Omega_m\approx 0.4$. We also discuss the prospects for mapping
the mass distribution on supercluster scales with gravitational lensing.

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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom