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X-ray spectra reveal the reawakening of the repeat changing-look AGN NGC 1566

Parker, M. L. and Schartel, N. and Grupe, D. and Komossa, S. and Harrison, F. and Kollatschny, W. and Mikula, R. and Santos-Lleó, M. and Tomás, L. (2019) X-ray spectra reveal the reawakening of the repeat changing-look AGN NGC 1566. Monthly Notices of the Royal Astronomical Society: Letters, 483 (1). L88-L92. ISSN 1745-3925. doi:10.1093/mnrasl/sly224.

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We present simultaneous XMM–Newton and NuSTAR observations of the repeat changing-look AGN NGC 1566, which dramatically increased in brightness in the IR to X-ray bands in 2018. The broad-band X-ray spectrum was taken at the peak of the outburst and is typical of Seyfert 1 AGN. The spectrum shows a soft excess, Compton hump, warm absorption and reflection, ruling out tidal disruption as the cause of the outburst and demonstrating that a ‘standard’ accretion disk can develop very rapidly. The high-resolution grating spectrum reveals that the outburst has launched a ∼500 km s^(−1) outflow, and shows photoionized emission lines from rest-frame gas. We discuss possible mechanisms for the outburst, and conclude that it is most likely caused by a disk instability.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Parker, M. L.0000-0002-8466-7317
Grupe, D.0000-0002-9961-3661
Harrison, F.0000-0003-2992-8024
Additional Information:© 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2018 November 23. Received 2018 November 13; in original form 2018 October 19. Published: 27 November 2018. MLP is supported by an ESA Research Fellowship. We thank the anonymous referee for detailed and constructive feedback. We thank J. Lewis for editing the manuscript. Based on observations obtained with XMM–Newton, an ESA science mission funded by ESA Member States and NASA, and the NuSTAR mission, a project led by Caltech, managed by JPL, and funded by NASA. This work has been supported by the Deutsche Forschungsgemeinschaft (DFG) grant Ko 857/33-1. We thank the Swift team for carrying out our ToO requests.
Group:NuSTAR, Space Radiation Laboratory, Astronomy Department
Funding AgencyGrant Number
European Space Agency (ESA)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)857/33-1
Subject Keywords:accretion, accretion discs, galaxies: active, galaxies: individual: NGC 1566, galaxies: Seyfert
Issue or Number:1
Record Number:CaltechAUTHORS:20190905-110449716
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Official Citation:M L Parker, N Schartel, D Grupe, S Komossa, F Harrison, W Kollatschny, R Mikula, M Santos-Lleó, L Tomás, X-ray spectra reveal the reawakening of the repeat changing-look AGN NGC 1566, Monthly Notices of the Royal Astronomical Society: Letters, Volume 483, Issue 1, February 2019, Pages L88–L92,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98432
Deposited By: Tony Diaz
Deposited On:05 Sep 2019 19:23
Last Modified:16 Nov 2021 17:39

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