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

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

http://hdl.handle.net/20.500.12386/30732

Url

http://arxiv.org/abs/1712.01300v1

https://academic.oup.com/mnras/article/474/4/5684/4712227

Issn Identifier

0035-8711

Ads BibCode

2018MNRAS.474.5684U

Rights

open.access

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Size

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

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