Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Redshift estimation of clusters by wavelet decomposition of their
  Sunyaev-Zel'dovich morphology   A method for estimating redshifts of galaxy clusters based solely on resolved
Sunyaev-Zel'dovich (SZ) images is proposed. Given a high resolution SZ cluster
image (with FWHM of approx. 1 arcmin), the method indirectly measures its
structure related parameters (amplitude, size, etc.) by fitting a model
function to the higher order wavelet momenents of the cluster's SZ morphology.
The applicability and accuracy of the wavelet method is assessed by applying it
to maps of a set of clusters extracted from hydrodynamical simulations of
cosmic structure formation. The parameters, derived by a fit to the spectrum of
wavelet moments as a function of scale, are found to show a dependence on
redshift z that is of the type x(z) = x_1 exp(-z/x_2) + x_3, where the monotony
of this functional behaviour and the non-degeneracy of those parameters allow
inversion and estimation of the redshift z. The average attainable accuracy in
the z-estimation relative to 1+z is approx. 4-5% out to z = 1.2, which is
comparable to photometric redshifts. For single-frequency SZ interferometers,
where the ambient fluctuating CMB is the main noise source, the accuracy of the
method drops slightly to <Delta z/(1+z)> = 6-7%.

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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci