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

doi:10.3390/universe10020061

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
p. 61

Abstract

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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.

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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