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Multi-epoch analysis of the X-ray spectrum of the active galactic nucleus in NGC 5506

Sun, Shangyu and Guainazzi, Matteo and Ni, Qingling and Wang, Jingchun and Qian, Chenyang and Shi, Fangzheng and Wang, Yu and Bambi, Cosimo (2018) Multi-epoch analysis of the X-ray spectrum of the active galactic nucleus in NGC 5506. Monthly Notices of the Royal Astronomical Society, 478 (2). pp. 1900-1910. ISSN 0035-8711. doi:10.1093/mnras/sty1233.

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We present a multi-epoch X-ray spectroscopy analysis of the nearby narrow-line Seyfert I galaxy NGC 5506. For the first time, spectra taken by Chandra, XMM–Newton, Suzaku, and NuSTAR– covering the 2000–2014 time span – are analysed simultaneously, using state-of-the-art models to describe reprocessing of the primary continuum by optical thick matter in the active galactic nucleus environment. The main goal of our study is determining the spin of the supermassive black hole (SMBH). The nuclear X-ray spectrum is photoelectrically absorbed by matter with column density ≃ 3 × 1022 cm−2. A soft excess is present at energies lower than the photoelectric cut-off. Both photoionized and collisionally ionized components are required to fit it. This component is constant over the time-scales probed by our data. The spectrum at energies higher than 2 keV is variable. We propose that its evolution could be driven by flux-dependent changes in the geometry of the innermost regions of the accretion disc. The black hole spin in NGC 5506 is constrained to be 0.93 ±^(0.04)_(0.04) at 90 per cent confidence level for one interesting parameter.

Item Type:Article
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URLURL TypeDescription Paper
Wang, Yu0000-0003-3589-9274
Bambi, Cosimo0000-0002-3180-9502
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 May 9. Received 2018 May 9; in original form 2017 April 13. Published: 11 May 2018. We thank the referee’s useful comments for improving this article. This work was supported by the NSFC (Grant Nos. U1531117 and 11305038), Fudan University (Grant No. IDH1512060), and the Thousand Young Talents Program. SS also acknowledges support from the AHEAD program for his visit to INAF-Bologna in June 2016. CB also acknowledges support from the Alexander von Humboldt Foundation. In this work, the authors used the data supplied by NASA’s High Energy Astrophysics Science Archive Research Center in the US. The authors also used the data products from the XMM–Newton, Suzaku, NuSTAR, and Chandra, funded by the ESA, JAXA, and NASA.
Subject Keywords:accretion, accretion discs – galaxies: active – galaxies: individual: NGC 5506
Issue or Number:2
Record Number:CaltechAUTHORS:20170414-100328272
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Official Citation:Shangyu Sun, Matteo Guainazzi, Qingling Ni, Jingchun Wang, Chenyang Qian, Fangzheng Shi, Yu Wang, Cosimo Bambi; Multi-epoch analysis of the X-ray spectrum of the active galactic nucleus in NGC 5506, Monthly Notices of the Royal Astronomical Society, Volume 478, Issue 2, 1 August 2018, Pages 1900–1910,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76568
Deposited By: Joy Painter
Deposited On:14 Apr 2017 18:19
Last Modified:15 Nov 2021 17:01

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