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The Seyfert 2 galaxy NGC 2110: hard X-ray emission observed by NuSTAR and variability of the iron Kα line

Marinucci, A. and Matt, G. and Bianchi, S. and Lu, T. N. and Arevalo, P. and Baloković, M. and Ballantyne, D. R. and Bauer, F. E. and Boggs, S. E. and Christensen, F. E. and Craig, W. W. and Gandhi, P. and Hailey, C. J. and Harrison, F. and Puccetti, S. and Rivers, E. and Walton, D. J. and Stern, D. and Zhang, W. (2015) The Seyfert 2 galaxy NGC 2110: hard X-ray emission observed by NuSTAR and variability of the iron Kα line. Monthly Notices of the Royal Astronomical Society, 447 (1). pp. 160-167. ISSN 0035-8711. doi:10.1093/mnras/stu2439.

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We present NuSTAR observations of the bright Seyfert 2 galaxy NGC 2110 obtained in 2012, when the source was at the highest flux level ever observed, and in 2013, when the source was at a more typical flux level. We include archival observations from other X-ray satellites, namely XMM–Newton, Suzaku, BeppoSAX, Chandra and Swift. Simultaneous NuSTAR and Swift broad-band spectra (in the 3–80 keV range) indicate a cutoff energy E_c > 210 keV, with no detectable contribution from Compton reflection. NGC 2110 is one of the very few sources where no evidence for distant Compton-thick scattering is found and, by using temporal information collected over more than a decade, we investigate variations of the iron Kα line on time-scales of years. The Fe Kα line is likely the sum of two components: one constant (originating from distant Compton-thick material) and the other one variable and linearly correlated with the source flux (possibly arising from Compton-thin material much closer to the black hole).

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle Paper
Matt, G.0000-0002-2152-0916
Bianchi, S.0000-0002-4622-4240
Ballantyne, D. R.0000-0001-8128-6976
Bauer, F. E.0000-0002-8686-8737
Boggs, S. E.0000-0001-9567-4224
Christensen, F. E.0000-0001-5679-1946
Gandhi, P.0000-0003-3105-2615
Harrison, F.0000-0003-2992-8024
Puccetti, S.0000-0002-2734-7835
Walton, D. J.0000-0001-5819-3552
Stern, D.0000-0003-2686-9241
Zhang, W.0000-0002-1426-9698
Additional Information:© 2014 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2014 November 15. Received 2014 October 29; in original form 2014 September 15. First published online December 12, 2014. AM and GM acknowledge financial support from Italian Space Agency under grant ASI/INAF I/037/12/0-011/13 and from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement n.312789. This work was supported under NASA Contract No. NNG08FD60C, and made use of data from the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by the National Aeronautics and Space Administration. We thank the NuSTAR Operations, Software and Calibration teams for support with the execution and analysis of these observations. This research has made use of the NuSTAR Data Analysis Software (NUSTARDAS) jointly developed by the ASI Science Data Center (ASDC, Italy) and the California Institute of Technology (USA). MB acknowledges support from the International Fulbright Science and Technology Award.
Group:NuSTAR, Space Radiation Laboratory
Funding AgencyGrant Number
Agenzia Spaziale Italiana (ASI)I/037/12/0-011/13
European Research Council (ERC)312789
International Fulbright Science and Technology AwardUNSPECIFIED
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Subject Keywords:galaxies: active; galaxies: individual: NGC 2110; galaxies: Seyfert
Issue or Number:1
Record Number:CaltechAUTHORS:20150403-083343981
Persistent URL:
Official Citation:A. Marinucci, G. Matt, S. Bianchi, T. N. Lu, P. Arevalo, M. Baloković, D. Ballantyne, F. E. Bauer, S. E. Boggs, F. E. Christensen, W. W. Craig, P. Gandhi, C. J. Hailey, F. Harrison, S. Puccetti, E. Rivers, D. J. Walton, D. Stern, and W. Zhang The Seyfert 2 galaxy NGC 2110: hard X-ray emission observed by NuSTAR and variability of the iron Kα line MNRAS (February 11, 2015) Vol. 447 160-167 doi:10.1093/mnras/stu2439 First published online December 12, 2014
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:56329
Deposited By: Tony Diaz
Deposited On:03 Apr 2015 19:45
Last Modified:10 Nov 2021 20:58

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