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The NuSTAR X-ray spectrum of the low-luminosity active galactic nucleus in NGC 7213

Ursini, F. and Marinucci, A. and Matt, G. and Bianchi, S. and Tortosa, A. and Stern, D. and Arevalo, P. and Ballantyne, D. R. and Bauer, F. E. and Fabian, A. C. and Harrison, F. A. and Lohfink, A. M. and Reynolds, C. S. and Walton, D. J. (2015) The NuSTAR X-ray spectrum of the low-luminosity active galactic nucleus in NGC 7213. Monthly Notices of the Royal Astronomical Society, 452 (3). pp. 3266-3272. ISSN 0035-8711. http://resolver.caltech.edu/CaltechAUTHORS:20150801-091143342

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Abstract

We present an analysis of the 3–79 keV NuSTAR spectrum of the low-luminosity active galactic nucleus NGC 7213. In agreement with past observations, we find a lower limit to the high-energy cut-off of E_c > 140 keV, no evidence for a Compton-reflected continuum and the presence of an iron K α complex, possibly produced in the broad-line region. From the application of the MYTORUS model, we find that the line-emitting material is consistent with the absence of a significant Compton reflection if arising from a Compton-thin torus of gas with a column density of 5.0^(+2.0)_(−1.6) × 10^(23) cm^(−2). We report variability of the equivalent width of the iron lines on the time-scale of years using archival observations from XMM–Newton, Chandra and Suzaku. This analysis suggests a possible contribution from dusty gas. A fit with a Comptonization model indicates the presence of a hot corona with a temperature kT_e > 40 keV and an optical depth τ ≲ 1, assuming a spherical geometry.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1093/mnras/stv1527DOIArticle
http://mnras.oxfordjournals.org/content/452/3/3266PublisherArticle
http://arxiv.org/abs/1507.01775arXivDiscussion Paper
ORCID:
AuthorORCID
Stern, D.0000-0003-2686-9241
Ballantyne, D. R.0000-0001-8128-6976
Bauer, F. E.0000-0002-8686-8737
Harrison, F. A.0000-0003-2992-8024
Walton, D. J.0000-0001-5819-3552
Alternate Title:The NuSTAR X-ray spectrum of the low-luminosity AGN in NGC 7213
Additional Information:© 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2015 July 7. Received 2015 May 27. In original form 2015 April 17. First published online August 3, 2015. We thank the anonymous referee for his/her helpful comments, which improved the manuscript. FU thanks Pierre-Olivier Petrucci for useful discussions and comments. This work is based on observations obtained with the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory and funded by NASA. This research has made use of data, software and/or web tools obtained from NASA's High Energy Astrophysics Science Archive Research Center (HEASARC), a service of Goddard Space Flight Center and the Smithsonian Astrophysical Observatory. FU, GM and SB acknowledge support from the French-Italian International Project of Scientific Collaboration: PICS-INAF project number 181542. FU acknowledges support from CNES and Université Franco-Italienne (Vinci PhD fellowship). FU, AM and GM acknowledge financial support from the Italian Space Agency under grant ASI/INAF I/037/12/0-011/13. SB acknowledges financial support from the Italian Space Agency under grant ASI-INAF I/037/12/P1. PA acknowledges support from FONDECYT 1140304. FEB acknowledges support from CONICYT-Chile (Basal-CATA PFB-06/2007, FONDECYT 1141218, ‘EMBIGGEN’ Anillo ACT1101) and the Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant IC120009, awarded to The Millennium Institute of Astrophysics, MAS.
Group:NuSTAR, Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASA/JPL/CaltechUNSPECIFIED
Istituto Nazionale di Astrofisica (INAF)181542
Universite Franco-ItalienneUNSPECIFIED
Agenzia Spaziale Italiana (ASI)I/037/12/0-011/13
Agenzia Spaziale Italiana (ASI)I/037/12/P1
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1140304
Basal-CATAPFB-06/2007
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1141218
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)ACT1101
Iniciativa Científica Milenio (ICM) del Ministerio de EconomíaIC120009
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Subject Keywords:galaxies: active; galaxies: individual: NGC 7213; galaxies: Seyfert; X-rays: galaxies
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2015-39
Record Number:CaltechAUTHORS:20150801-091143342
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150801-091143342
Official Citation:F. Ursini, A. Marinucci, G. Matt, S. Bianchi, A. Tortosa, D. Stern, P. Arévalo, D. R. Ballantyne, F. E. Bauer, A. C. Fabian, F. A. Harrison, A. M. Lohfink, C. S. Reynolds, and D. J. Walton The NuSTAR X-ray spectrum of the low-luminosity active galactic nucleus in NGC 7213 MNRAS (September 21, 2015) Vol. 452 3266-3272 doi:10.1093/mnras/stv1527 First published online August 3, 2015
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59135
Collection:CaltechAUTHORS
Deposited By: Joy Painter
Deposited On:06 Aug 2015 18:28
Last Modified:30 Nov 2017 22:15

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