Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reionization on ice   The case for substantial far infrared ice emission in local ultraluminous
infrared galaxies, expected based on the presence of mid-infrared ice
absorption in their spectra and the known far infrared optical properties of
ice, is still largely unsupported by direct observation owing to insufficient
far infrared spectral coverage. Some marginal supportive evidence is presented
here.
  A clear consequence of far infrared ice emission is the need to extend the
range of redshifts considered for submillimeter sources. This is demonstrated
via the example of HDF 850.1.
  The solid phase of the ISM during reionization may be dominated by ice, and
this could lead to the presence of reionization sources in submillimeter source
catalogs. Submillimeter sources not detected at 24 micron in the GOODS-N field
are examined. Two candidate reionization sources are identified at 3.6 micron
through possible Gunn-Peterson saturation in the Z band.

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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas