Publication Date:
2015-08-05
Description:
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 $5.0^{+2.0}_{-1.6}\times 10^{23}$ 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 1, assuming a spherical geometry.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
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