Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Molecular ISM of Low Surface Brightness Spiral Galaxies   I summarize some results from the recent CO survey of late-type, low surface
brightness (LSB) spiral galaxies by Matthews et al. (2005). We have now
detected CO emission from six late-type, LSB spirals, demonstrating that
despite their typical low metallicities and low mean gas surface densities,
some LSB galaxies contain a molecular medium that is traced by CO. We find that
the CO-detected LSB spirals adhere to the same M_H2-FIR correlation as brighter
galaxies. We also find a significant drop-off in the detectability of CO among
low-to-intermediate surface brightness galaxies with V_rot<~90 km/s, pointing
toward fundamental changes in the physical conditions of the ISM with
decreasing disk mass.

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The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: physics
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The categories of this paper are: q-bio