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

I. Varglund; E. Järvelä; S. Ciroi; M. Berton; E. Congiu; A. Lähteenmäki; F. Di Mille

doi:10.1051/0004-6361/202346131

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

I. Varglund^*, E. Järvelä, S. Ciroi, M. Berton, E. Congiu, A. Lähteenmäki, F. Di Mille

^*Corresponding author for this work

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Abstract

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.

Original language	English
Article number	A32
Journal	Astronomy and Astrophysics
Volume	679
DOIs	https://doi.org/10.1051/0004-6361/202346131
Publication status	Published - 1 Nov 2023
MoE publication type	A1 Journal article-refereed

Keywords

Galaxies: active
Galaxies: Seyfert
Galaxies: structure
Infrared: galaxies

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10.1051/0004-6361/202346131Licence: CC BY

Varglund_Host_galaxy_study_AANDAFinal published version, 1.58 MBLicence: CC BY

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@article{06550ad11931460aad85542e6994386f,

title = "A host galaxy study of southern narrow-line Seyfert 1 galaxies",

abstract = "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.",

keywords = "Galaxies: active, Galaxies: Seyfert, Galaxies: structure, Infrared: galaxies",

author = "I. Varglund and E. J{\"a}rvel{\"a} and S. Ciroi and M. Berton and E. Congiu and A. L{\"a}hteenm{\"a}ki and {Di Mille}, F.",

note = "Funding Information: IRAF is distributed by the National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with FourStar, an infrared camera, part of the Magellan 6.5 m telescopes, at the Las Campanas Observatory in Chile. This research has made use of GALFIT. This publication made use of the SIMBAD database, operated at CDS, Strasbourg, France. This research has made use of “Aladin sky atlas” developed at CDS, Strasbourg Observatory, France. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research made use of Astropy ( http://www.astropy.org ), a community-developed core Python package for Astronomy (Astropy Collaboration 2013, 2018). This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. I.V. would like to thank both the Magnus Ehrnrooth Foundation and the Vilho, Yrj{\"o} and Kalle V{\"a}is{\"a}l{\"a} Foundation of the Finnish Academy of Science and Letters for their support. M.B. and E.C. are ESO fellows. Publisher Copyright: {\textcopyright} 2022 EPJ Photovoltaics. All rights reserved.",

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doi = "10.1051/0004-6361/202346131",

language = "English",

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AU - Järvelä, E.

AU - Ciroi, S.

AU - Berton, M.

AU - Congiu, E.

AU - Lähteenmäki, A.

AU - Di Mille, F.

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PY - 2023/11/1

Y1 - 2023/11/1

N2 - 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.

AB - 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.

KW - Galaxies: active

KW - Galaxies: Seyfert

KW - Galaxies: structure

KW - Infrared: galaxies

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DO - 10.1051/0004-6361/202346131

M3 - Article

AN - SCOPUS:85176786149

SN - 0004-6361

VL - 679

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A32

ER -

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

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

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