Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Supernova rates in Abell galaxy clusters and implications for
  metallicity   Supernovae (SNe) play a critical role in the metal enrichment of the
intra-cluster medium (ICM) in galaxy clusters. Not only are SNe the main source
for metals, but they may also supply the energy to eject enriched gas from
galaxies by winds. However, measurements of SN rates in galaxy clusters have
not been published to date. We have initiated a program to find SNe in 163
medium-redshift (0.06<z<0.2) Abell clusters, using the Wise Observatory 1m
telescope. Our program has already discovered 11 spectroscopically confirmed
SNe at z=0.1 - 0.24, and several unconfirmed SNe. We present the main
scientific goals of this project, and discuss a novel explanation for the
centrally enhanced metal abundances indicated by X-ray observations of galaxy
clusters, based on the contribution of intergalactic SNe.

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The categories of this paper are: physics
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The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
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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: stat
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The categories of this paper are: math
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
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The categories of this paper are: cond-mat