Search

From the spectral analysis of long Suzaku observations of five radio-loud AGNs we have been able to discover the presence of ultra-fast outflows with velocities ~0.1c in three of them, namely 3C 111, 3C 120 and 3C 390.3. They are consistent with being accretion disk winds/outflows. We also performed a follow-up on 3C 111 to monitor its outflow on ~7 days time-scales and detected an anti-correlated variability of a possible relativistic emission line with respect to blueshifted Fe K features, following a flux increase. This provides the first direct evidence for an accretion disc-wind connection in an AGN. The mass outflow rate of these outflows can be comparable to the accretion rate and their mechanical power can correspond to a significant fraction of the bolometric luminosity and is comparable to their typical jet power. Therefore, they can possibly play a significant role in the expected feedback from AGNs and can give us further clues on the relation between the accretion disk and the formation of winds/jets. [ABSTRACT FROM AUTHOR]

We performed a blind search for blue-shifted Fe K absorption lines at energies greater than 6 keV in the X-ray spectra of a sample of 44 radio-quiet AGNs observed with XMM-Newton. We statistically quantified the parameters and the incidence of such lines and also determined their detection significance through extensive Monte Carlo simulations. This allows us to define their global veracity and to overcome the reported publication bias. These findings suggest the presence of previously unknown ultra-fast outflows in radio-quiet AGNs. [ABSTRACT FROM AUTHOR]

While in Radio–Quiet (RQ) AGN warm gas photoionised by the nuclear engine has been well revealed and studied in X-rays, it is still unclear whether a similar gaseous environment can survive in Radio–Loud (RL) objects. The exploration of the environment surrounding the nuclei of RL sources is an important point to be addressed. It can help to understand the physical link among accretion flows, winds and jet, and the influence that each component can have on the host galaxy. We report on the recent discovery of warm gas in RL AGN, indicating that relativistic collimated plasma (jet) and slower outflows of photoionised gas can coexist in the same source. The physical properties of this gas seem to be very similar to RQ ones, suggesting that RL and RQ AGN environment becomes indistinguishable at large distances from the central engine (e.g. the Narrow Line Region). [ABSTRACT FROM AUTHOR]