The Interacting Late-type Host Galaxy of the Radio-loud Narrow-line Seyfert 1 IRAS 20181-2244

Tutkimustuotos: Lehtiartikkeli


  • M. Berton
  • E. Congiu
  • S. Ciroi
  • S. Komossa
  • M. Frezzato
  • F. Di Mille
  • S. Antón
  • R. Antonucci
  • A. Caccianiga
  • P. Coppi
  • Emilia Järvelä

  • J. Kotilainen
  • Anne Lähteenmäki

  • S. Mathur
  • S. Chen
  • V. Cracco
  • G. La Mura
  • P. Rafanelli


  • University of Turku
  • University of Padova
  • Osservatorio Astronomico di Brera
  • INAF - Osservatorio Astronomico di Padova
  • Max Planck Institute for Radio Astronomy
  • Carnegie Institution of Washington
  • University of Aveiro
  • University of California at Santa Barbara
  • Yale University
  • Ohio State University
  • Guangzhou University
  • University of Lisbon


Narrow-line Seyfert 1 galaxies (NLS1s) are a class of active galactic nuclei that are known to be one of the few sources of γ-rays, which originate in a relativistic beamed jet. Because 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 6.5 m Baade Telescope of the Las Campanas Observatory. The GALFIT analysis run 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.


JulkaisuAstronomical Journal
TilaJulkaistu - 1 helmikuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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