Universe
(Jan 2024)
Changing-Look Narrow-Line Seyfert 1 Galaxies, their Detection with SVOM, and the Case of NGC 1566
D. W. Xu,
S. Komossa,
D. Grupe,
J. Wang,
L. P. Xin,
X. H. Han,
J. Y. Wei,
J. Y. Bai,
E. Bon,
F. Cangemi,
B. Cordier,
M. Dennefeld,
L. C. Gallo,
W. Kollatschny,
De-Feng Kong,
M. W. Ochmann,
Y. L. Qiu,
N. Schartel
Affiliations
D. W. Xu
Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
S. Komossa
Max–Planck Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
D. Grupe
Department of Physics, Geology, and Engineering Technology, Northern Kentucky University, 1 Nunn Drive, Highland Heights, KY 41099, USA
J. Wang
Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
L. P. Xin
Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
X. H. Han
Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
J. Y. Wei
Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
J. Y. Bai
Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
E. Bon
Astronomical Observatory Belgrade, Volgina 7, 11060 Belgrade, Serbia
F. Cangemi
Sorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies, LPNHE, 4 Place Jussieu, 75005 Paris, France
B. Cordier
CEA-Saclay, IRFU/Departement d’Astrophysique, 91191 Gif-sur-Yvette, France
M. Dennefeld
Institut d′Astrophysique de Paris, Sorbonne Université, CNRS, UMR 7095, 98 bis bd Arago, 75014 Paris, France
L. C. Gallo
Department of Astronomy and Physics, Saint Mary’s University, 923 Robie Street, Halifax, NS B3H 3C3, Canada
W. Kollatschny
Institut für Astrophysik und Geophysik, Universität Göttingen, Friedrich-Hund Platz 1, 37077 Göttingen, Germany
De-Feng Kong
Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
M. W. Ochmann
Institut für Astrophysik und Geophysik, Universität Göttingen, Friedrich-Hund Platz 1, 37077 Göttingen, Germany
Y. L. Qiu
Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
N. Schartel
ESA, European Space Astronomy Centre (ESAC), Villanueva de la Cañada, E-28692 Madrid, Spain
DOI
https://doi.org/10.3390/universe10020061
Journal volume & issue
Vol. 10,
no. 2
Abstract
Read online
We discuss applications of the study of the new and barely explored class of changing-look (CL) narrow-line Seyfert 1 (NLS1) galaxies and comment on their detection with the space mission SVOM (Space Variable Objects Monitor). We highlight the case of NGC 1566, which is outstanding in many respects, for instance as one of the nearest known CL AGN undergoing exceptional outbursts. Its NLS1 nature is discussed, and we take it as a nearby prototype for systems that could be discovered and studied in the near future, including with SVOM. Finally, we briefly examine the broader implications and applications of CL events in NLS1 galaxies and show that such systems, once discovered in larger numbers, will greatly advance our understanding of the physics of the environment of rapidly growing supermassive black holes. This White Paper is part of a sequence of publications which explore aspects of our understanding of (CL) NLS1 galaxy physics with future missions.
Keywords
Published in Universe
ISSN
2218-1997 (Online)
Publisher
MDPI AG
Country of publisher
Switzerland
LCC subjects
Science: Physics: Nuclear and particle physics. Atomic energy. Radioactivity: Elementary particle physics
Website
http://www.mdpi.com/journal/universe
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