Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A UV study of nearby luminous infrared galaxies: star formation
  histories and the role of AGN   We employ UV and optical photometry, from the GALEX and SDSS surveys
respectively, to study the star formation histories of 561 luminous infrared
galaxies (LIRGs) in the nearby Universe. A small fraction (~4%) of these
galaxies have spheroidal or near-spheroidal morphologies and could be
progenitors of elliptical galaxies. The remaining galaxies are morphologically
late-type or ongoing mergers. 61% of the LIRGs do not show signs of
interactions, while the remaining objects are either interacting (~18%) or show
post-merger morphologies (~19%). The (SSP-weighted) average age of the
underlying stellar populations in these objects is typically 5-9 Gyrs, with a
mean value of ~6.8 Gyrs. ~60% of the LIRG population began their recent star
formation (RSF) episode within the last Gyr, while the remaining objects began
their RSF episodes 1 to 3 Gyrs in the past. Up to 35% of the stellar mass in
the remnant forms in these episodes - the mean value is ~15%. The (decay)
timescales of the star formation are typically a few Gyrs, indicating that the
star formation rate does not decline significantly during the course of the
burst. 14% of the LIRG population host (Type 2) AGN. The AGN hosts exhibit UV
and optical colours that are redder than those of the normal (non-AGN)
population. However, there is no evidence for a systematically higher dust
content in the AGN hosts. AGN typically appear ~0.5-0.7 Gyrs after the onset of
star formation and the redder colours are a result of older RSF episodes, with
no measurable evidence of negative feedback from the AGN on the star formation
in their host galaxies. (abridged)

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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin