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A low-flux state in IRAS 00521−7054 seen with NuSTAR and XMM–Newton: relativistic reflection and an ultrafast outflow

Walton, D. J. and Nardini, E. and Gallo, L. C. and Reynolds, M. T. and Ricci, C. and Dauser, T. and Fabian, A. C. and García, J. A. and Harrison, F. A. and Risaliti, G. and Stern, D. (2019) A low-flux state in IRAS 00521−7054 seen with NuSTAR and XMM–Newton: relativistic reflection and an ultrafast outflow. Monthly Notices of the Royal Astronomical Society, 484 (2). pp. 2544-2555. ISSN 0035-8711. doi:10.1093/mnras/stz115.

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We present results from a deep, coordinated XMM–Newton + NuSTARobservation of the Seyfert 2 galaxy IRAS 00521−7054. The NuSTAR data provide the first detection of this source in high-energy X-rays (E > 10 keV), and the broad-band data show this to be a highly complex source which exhibits relativistic reflection from the inner accretion disc, further reprocessing by more distant material, neutral absorption, and evidence for ionized absorption in an extreme, ultrafast outflow (⁠v_(out) ∼ 0.4c). Based on lamppost disc reflection models, we find evidence that the central supermassive black hole is rapidly rotating (a > 0.77), consistent with previous estimates from the profile of the relativistic iron line, and that the accretion disc is viewed at a fairly high inclination (i ∼ 59°). Based on extensive simulations, we find the ultrafast outflow is detected at ∼4σ significance (or greater). We also estimate that the extreme outflow should be sufficient to power galaxy-scale feedback, and may even dominate the energetics of the total output from the system.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Walton, D. J.0000-0001-5819-3552
Nardini, E.0000-0001-9226-8992
Ricci, C.0000-0001-5231-2645
Dauser, T.0000-0003-4583-9048
Fabian, A. C.0000-0002-9378-4072
García, J. A.0000-0003-3828-2448
Harrison, F. A.0000-0003-2992-8024
Stern, D.0000-0003-2686-9241
Additional Information:© 2019 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 2019 January 1. Received 2018 December 19; in original form 2018 November 8. Published: 16 January 2019. The authors would like to thank the reviewer for their feedback, which helped improve the clarity of the final version of the manuscript, and C. Done for useful discussion. DJW acknowledges support from an STFC Ernest Rutherford Fellowship; EN acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 664931; CR acknowledges the CONICYT + PAI Convocatoria Nacional subvencion a instalacion en la academia convocatoria año 2017 PAI77170080; ACF acknowledges support from ERC Advanced Grant 340442; JAG acknowledges support from NASA grant NNX17AJ65G and from the Alexander von Humboldt Foundation. This research has made use of data obtained with NuSTAR, a project led by Caltech, funded by NASA and managed by NASA/JPL, and has utilized the NUSTARDAS software package, jointly developed by the ASDC (Italy) and Caltech (USA). This research has also made use of data obtained with XMM–Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States.
Group:NuSTAR, Space Radiation Laboratory, Astronomy Department
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)UNSPECIFIED
Marie Curie Fellowship664931
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)PAI77170080
European Research Council (ERC)340442
Alexander von Humboldt FoundationUNSPECIFIED
Subject Keywords:black hole physics – galaxies: active – X-rays: individual: (IRAS 00521−7054)
Issue or Number:2
Record Number:CaltechAUTHORS:20190222-073613522
Persistent URL:
Official Citation:D J Walton, E Nardini, L C Gallo, M T Reynolds, C Ricci, T Dauser, A C Fabian, J A García, F A Harrison, G Risaliti, D Stern; A low-flux state in IRAS 00521−7054 seen with NuSTAR and XMM–Newton: relativistic reflection and an ultrafast outflow, Monthly Notices of the Royal Astronomical Society, Volume 484, Issue 2, 1 April 2019, Pages 2544–2555,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93175
Deposited By: Tony Diaz
Deposited On:22 Feb 2019 16:56
Last Modified:16 Nov 2021 16:55

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