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 Kα 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.
Ursini, F., Bassani, L., Panessa, F., Bazzano, A., Bird, A.J., Malizia, A., et al. (2018). Where are Compton-thick radio galaxies? A hard X-ray view of three candidates. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 474(4), 5684-5693 [10.1093/mnras/stx3159].
Where are Compton-thick radio galaxies? A hard X-ray view of three candidates
Ursini F.
;
2018-01-01
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 Kα 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
