Speaker
Description
Supermassive black hole (SMBH) winds are believed to be a key player in the evolution of galaxies. In fact, outflows from active galactic nuclei (AGN) may be one of the fundamental mechanisms by which a SMBH transfers a significant fraction of its accretion energy to the surrounding environment. Disk-scale ionized ultra-fast outflows (UFOs) and large-scale warm absorbers (WAs) are commonly found in the X-ray spectra of many Seyfert galaxies and quasars. Even though a correlation between these two absorbers has been suggested in the past, a direct link is still missing. Here we present the analysis of 12 XMM-Newton EPIC spectra in which, together with WA and UFO, we found a 'low-ionization UFO'. This absorber has the same velocity as the UFO ($v\sim0.15c$), but ionization and column density comparable with the WA ($\log(\xi/\text{erg cm s$^{-1}$})\sim0.5$ and $\log (N_H/\text{ cm$^{-2}$})\sim21.5$, respectively). Moreover, independently on the assumption of either momentum- or energy-conserving UFO-WA interaction, this absorber shows a low value of the clumpiness, $Cv\sim10^{-3}$. This strongly suggests that this absorber is produced by the interaction between the UFO on the surrounding WA, and that such interaction occurs via entraining of a fast UFO on the WA, pushing a fraction of clumps to comparable velocities, producing the observed 'entrained ultra-fast outflow' (E-UFO).
| Affiliation | INAF - Osservatorio Astronomico di Brera |
|---|---|
| Topic | Active Galactic Nuclei: accretion physics and evolution across cosmic time |
