Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Uncovering High-z Clusters Using Wide-Angle Tailed Radio Sources   The morphologies of wide-angle tailed (WAT) radio sources (edge-darkened,
C-shaped, FR I radio sources) are the result of confinement and distortion of
the radio lobes by the dense X-ray-emitting gas in clusters or groups of
galaxies. These radio sources are easily seen at high redshifts (z~1) in
short-exposure images from the Faint Images of the Radio Sky at Twenty-cm
(FIRST) survey. Using a sample of approximately 400 WAT sources from the FIRST
survey, we have discovered a number of high-z clusters. Here, we present the
highest-z cluster found so far using this method: 1137+3000 at z=0.96. We
include photometric and spectroscopic results. Ten galaxies are confirmed at
the cluster redshift, with a line-of-sight velocity dispersion of 530 +190/-90
km/s, typical of an Abell richness class 0 cluster.

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The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
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The categories of this paper are: stat
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat