Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Primordial Molecular Emission in Population III Galaxies   We study formation of molecules in primordial prestellar clumps and evaluate
the line luminosities to assess detectability by next-generation facilities. If
the initial H_2 fraction is sufficiently high, HD becomes an important coolant
in the clumps. The luminosity from such HD cooling clumps is lower than that
from H_2 cooling ones because of lower temperature (<100K). As for Li
reactions, we include the three-body LiH formation approximately. The Li
molecular fraction remains very low (<10^{-3}) throughout the evolution owing
to the high dissociative reaction rate of LiH +H -> Li + H_2. LiH does not
become an important coolant in any density range. The luminous emission lines
from the prestellar cores include H_2 rovibrational lines: 1-0 Q(1), 1-0 O(3),
1-0 O(5), and pure rotational lines: 0-0 S(3), 0-0 S(4), 0-0 S(5). The
next-generation facilities SPICA and JWST are able to detect H_2 emission in a
large pre-galactic cloud that forms metal-free stars at a high rate of \sim
10^3 M_s/yr at redshift z<10. We also derive an analytical expression for the
luminosity that reproduces the numerical results.

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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics