Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The interacting late-type host galaxy of the radio-loud narrow-line
  Seyfert 1 IRAS 20181-2244   Narrow-line Seyfert 1 galaxies (NLS1s) are a class of active galactic nuclei
(AGN) which are known to be one of the few sources of $\gamma$ rays, which
originate in a relativistic beamed jet. Becuase of their relatively large
distance, a poorly investigated aspect of these jetted NLS1s is their
environment, and in particular their host galaxy. In this work we present the
results of a morphological analysis of the host galaxy of the jetted NLS1 IRAS
20181-2244 observed with the 6.5m Baade Telescope of the Las Campanas
Observatory. The GALFIT analysis ran on the Ks image, along with additional
spectroscopic observations performed with the Nordic Optical Telescope, clearly
revealed the presence of an interacting system of two galaxies. The data
suggest that this NLS1 is hosted by a late-type galaxy, although the result is
not conclusive. This analysis, along with other results in the literature,
might suggest that two populations of jetted NLS1 exist. Further morphological
studies are needed to confirm or disprove this hypothesis.

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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: nlin