Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detection of the 158 micron [CII] Transition at z=1.3: Evidence for a
  Galaxy-Wide Starburst   We report the detection of 158 micron [CII] fine-structure line emission from
MIPS J142824.0+352619, a hyperluminous (L_IR ~ 10^13 L_sun) starburst galaxy at
z=1.3. The line is bright, and corresponds to a fraction L_[CII]/L_FIR = 2 x
10^-3 of the far-IR (FIR) continuum. The [CII], CO, and FIR continuum emission
may be modeled as arising from photodissociation regions (PDRs) that have a
characteristic gas density of n ~ 10^4.2 cm^-3, and that are illuminated by a
far-UV radiation field ~10^3.2 times more intense than the local interstellar
radiation field. The mass in these PDRs accounts for approximately half of the
molecular gas mass in this galaxy. The L_[CII]/L_FIR ratio is higher than
observed in local ULIRGs or in the few high-redshift QSOs detected in [CII],
but the L_[CII]/L_FIR and L_CO/L_FIR ratios are similar to the values seen in
nearby starburst galaxies. This suggests that MIPS J142824.0+352619 is a
scaled-up version of a starburst nucleus, with the burst extended over several
kiloparsecs.

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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: math
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The categories of this paper are: mtrl-th
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: physics