Where are Compton-thick radio galaxies? A hard X-ray view of three candidates

Journal
Date Issued
2018
Author(s)
•
•
•
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Bird, A. J.
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Ubertini, P.
DOI
Abstract
We present a broad-band X-ray spectral analysis of the radio-loud active galactic nuclei NGC 612, 4C 73.08 and 3C 452, exploiting archival data from NuSTAR, XMM-Newton, Swift and INTEGRAL. These Compton-thick candidates are the most absorbed sources among the hard X-ray selected radio galaxies studied in Panessa et al. We find an X-ray absorbing column density in every case below 1.5 × 1024 cm-2, and no evidence for a strong reflection continuum or iron K α line. Therefore, none of these sources is properly Compton-thick. We review other Compton-thick radio galaxies reported in the literature, arguing that we currently lack strong evidences for heavily absorbed radio-loud AGNs.
Volume
474
Issue
4
Start page
5684
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2018MNRAS.474.5684U
Rights
open.access
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