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

Journal Article · Fri Feb 01 04:00:00 EST 2019 · The Astronomical Journal (Online)

DOI:https://doi.org/10.3847/1538-3881/AAF5CA· OSTI ID:22897260

Berton, M.; Kotilainen, J. ^[1]; Congiu, E.; Ciroi, S.; Frezzato, M.; Chen, S.; Cracco, V.; Rafanelli, P. ^[2]; Komossa, S. ^[3]; Mille, F. Di ^[4]; Antón, S. ^[5]; Antonucci, R. ^[6]; Caccianiga, A. ^[7]; Coppi, P. ^[8]; Järvelä, E.; Lähteenmäki, A. ^[9]; Mathur, S. ^[10]

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1. Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Quantum, Vesilinnantie 5, FI-20014 University of Turku (Finland)
2. Dipartimento di Fisica e Astronomia “G. Galilei,” Università di Padova, Vicolo dell’Osservatorio 3, I-35122 Padova (Italy)
3. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn (Germany)
4. Las Campanas Observatory, Carnegie Institution of Washington, Colina El Pino Casilla 601, La Serena (Chile)
5. CIDMA, Department of Physics, University of Aveiro, 3810-193, Aveiro (Portugal)
6. Department of Physics, University of California, Santa Barbara, CA 93106-9530 (United States)
7. INAF—Osservatorio Astronomico di Brera, via E. Bianchi 46, I-23807 Merate (Italy)
8. Yale Center for Astronomy and Astrophysics, Yale University, New Haven, CT 06520-8121 (United States)
9. Aalto University Metsähovi Radio Observatory, Metsähovintie 114, FI-02540 Kylmälä (Finland)
10. Department of Astronomy and Center for Cosmology and AstroParticle Physics, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States)

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.

• OSTI ID: 22897260
• Journal Information: The Astronomical Journal (Online), Journal Name: The Astronomical Journal (Online) Journal Issue: 2 Vol. 157; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
DISTANCE
GALAXY NUCLEI
HYPOTHESIS
PHOTOMETRY
RELATIVISTIC RANGE
SEYFERT GALAXIES
TELESCOPES