A host galaxy study of southern narrow-line Seyfert 1 galaxies

被引：4
作者：
Varglund I. [1 ,2 ]
Järvelä E. [3 ,4 ]
Ciroi S. [5 ]
Berton M. [6 ]
Congiu E. [6 ]
Lähteenmäki A. [1 ,2 ]
Di Mille F. [7 ]
机构：
[1] Aalto University Metsähovi Radio Observatory, Metsähovintie 114, Kylmälä
[2] Aalto University Department of Electronics and Nanoengineering, PO Box 15500, Aalto
[3] European Space Agency (ESA), European Space Astronomy Centre (ESAC), Camino Bajo del Castillo s/n, Madrid, Villanueva de la Cañada
[4] Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma, 440 W. Brooks St., Norman, 73019, OK
[5] Dipartimento di Fisica e Astronomia G. Galilei, Universitá di Padova, Vicolo dell'Osservatorio 3, Padova
[6] European Southern Observatory (ESO), Alonso de Córdova 3107, Casilla 19, Santiago
[7] Las Campanas Observatory, Carnegie Observatories, Colina El Pino, Casilla 601, La Serena
来源：
Astronomy and Astrophysics | 2023年 / 679卷
基金：
美国国家科学基金会; 美国国家航空航天局;
关键词：
Galaxies: active; Galaxies: Seyfert; Galaxies: structure; Infrared: galaxies;
D O I：
10.1051/0004-6361/202346131
中图分类号：
学科分类号：
摘要：
We studied seven nearby narrow-line Seyfert 1 (NLS1) galaxies in J and Ks bands with redshifts varying from 0.019 to 0.092. This is the first multi-source study targeting the hosts of southern NLS1 galaxies. Our data were obtained with the FourStar instrument of the 6.5 m Magellan Baade telescope at the Las Campanas Observatory (Chile). The aim of our study is to determine the host galaxy morphologies of these sources by using GALFIT. We were able to model six out of the seven sources reliably. Our conclusion is that all of the reliably modelled sources are disk-like galaxies, either spirals or lenticulars. None of these sources present an elliptical morphology. Our findings are in agreement with the hypothesis that disk-like galaxies are the main host of jetted NLS1 galaxies. Taking advantage of observations in two bands, we also produced a J-Ks colour map of each source. Five of the six colour maps show significant dust extinction near the core of the galaxy-a feature often seen in gamma-ray-detected jetted NLS1 galaxies, and interpreted to be a consequence of a past minor merger. © 2022 EPJ Photovoltaics. All rights reserved.
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