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

Loading...
Thumbnail Image

Access rights

openAccess

URL

Journal Title

Journal ISSN

Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2019-02-01

Major/Subject

Mcode

Degree programme

Language

en

Pages

Series

Astronomical Journal, Volume 157, issue 2

Abstract

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.

Description

Keywords

galaxies: active, galaxies: peculiar, galaxies: photometry, galaxies: Seyfert

Other note

Citation

Berton, M, Congiu, E, Ciroi, S, Komossa, S, Frezzato, M, Mille, F D, Antón, S, Antonucci, R, Caccianiga, A, Coppi, P, Jarvela, E, Kotilainen, J, Lahteenmaki, A, Mathur, S, Chen, S, Cracco, V, Mura, G L & Rafanelli, P 2019, ' The Interacting Late-type Host Galaxy of the Radio-loud Narrow-line Seyfert 1 IRAS 20181-2244 ', Astronomical Journal, vol. 157, no. 2, 48 . https://doi.org/10.3847/1538-3881/aaf5ca