Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cluster Evolution Since z~1   We have used the Advanced Camera for Surveys (ACS) on the HST to obtain
optical imaging of a sample of 8 galaxy clusters in the redshift range 0.8 < z
< 1.3. The ACS data provides accurate photometry and the ACS high angular
resolution makes it possible to obtain crucial morphological information of the
cluster galaxy populations. These data are supported by X-ray observations and
by ground based imaging and multi-object spectroscopy. We will present results
from this multi-wavelength study which is providing a comprehensive view of the
evolution of structures in the universe since z~1. The structure of the ICM,
galaxy and DM components of the clusters are presented and compared. The
spectrophotometric properties of cluster galaxies are investigated in the
context of galaxy evolution and the formation epoch of massive early-type
galaxies in these clusters is estimated to be at z > 2. We will also present
results from our study of the evolution of the Morphology-Density relation in
clusters since z~1 down to the present day universe. Our cluster evolution
studies are also being complemented by observations of protoclusters at
redshift z>~2.

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The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
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The categories of this paper are: econ
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org