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The Broadband Spectral Variability of MCG–6-30-15 Observed by NuSTAR and XMM-Newton

Marinucci, A. and Matt, G. and Miniutti, G. and Guainazzi, M. and Parker, M. L. and Brenneman, L. and Fabian, A. C. and Kara, E. and Arevalo, P. and Ballantyne, D. R. and Boggs, S. E. and Cappi, M. and Christensen, F. E. and Craig, W. W. and Elvis, M. and Hailey, C. J. and Harrison, F. A. and Reynolds, C. S. and Risaliti, G. and Stern, D. K. and Walton, D. J. and Zhang, W. (2014) The Broadband Spectral Variability of MCG–6-30-15 Observed by NuSTAR and XMM-Newton. Astrophysical Journal, 787 (1). Art. No. 83. ISSN 0004-637X. doi:10.1088/0004-637X/787/1/83.

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MCG–6-30-15, at a distance of 37 Mpc (z = 0.008), is the archetypical Seyfert 1 galaxy showing very broad Fe Kα emission. We present results from a joint NuSTAR and XMM-Newton observational campaign that, for the first time, allows a sensitive, time-resolved spectral analysis from 0.35 keV up to 80 keV. The strong variability of the source is best explained in terms of intrinsic X-ray flux variations and in the context of the light-bending model: the primary, variable emission is reprocessed by the accretion disk, which produces secondary, less variable, reflected emission. The broad Fe Kα profile is, as usual for this source, well explained by relativistic effects occurring in the innermost regions of the accretion disk around a rapidly rotating black hole. We also discuss the alternative model in which the broadening of the Fe Kα is due to the complex nature of the circumnuclear absorbing structure. Even if this model cannot be ruled out, it is disfavored on statistical grounds. We also detected an occultation event likely caused by broad-line region clouds crossing the line of sight.

Item Type:Article
Related URLs:
URLURL TypeDescription
Matt, G.0000-0002-2152-0916
Parker, M. L.0000-0002-8466-7317
Fabian, A. C.0000-0002-9378-4072
Kara, E.0000-0003-0172-0854
Ballantyne, D. R.0000-0001-8128-6976
Boggs, S. E.0000-0001-9567-4224
Christensen, F. E.0000-0001-5679-1946
Harrison, F. A.0000-0003-2992-8024
Stern, D. K.0000-0003-2686-9241
Walton, D. J.0000-0001-5819-3552
Zhang, W.0000-0002-1426-9698
Additional Information:© 2014 American Astronomical Society. Received 2013 December 23; accepted 2014 April 11; published 2014 May 6. A.M. acknowledges financial support from Fondazione Angelo Della Riccia. A.M. and G.M. acknowledge financial support from Italian Space Agency under grant ASI/INAF I/037/ 12/0-011/13. A.M., G. Matt, G. Miniutti, A.C.F., and E.K. acknowledge financial support from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 312789. P.A. acknowledges financial support from Anillo ACT1101. 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).
Group:NuSTAR, Space Radiation Laboratory
Funding AgencyGrant Number
Agenzia Spaziale Italiana (ASI)ASI/INAF I/037/ 12/0-011/13
European Research Council (ERC)312789
Anillo projectACT1101
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Subject Keywords:accretion, accretion disks; galaxies: active; galaxies: Seyfert; X-rays: individual (MCG–6-30-015)
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2014-55
Issue or Number:1
Record Number:CaltechAUTHORS:20140617-103551890
Persistent URL:
Official Citation:The Broadband Spectral Variability of MCG–6-30-15 Observed by NuSTAR and XMM-Newton A. Marinucci et al. 2014 ApJ 787 83
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46306
Deposited By: Ruth Sustaita
Deposited On:17 Jun 2014 18:31
Last Modified:10 Nov 2021 17:23

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