Oral Presentation
X-ray Radiatively-driven extremely-fast clumpy outflow in the superEddington AGN
Presenter: Misaki Mizumoto (Kyoto University)
X-ray observations have shown multiple outflows in active galactic nuclei (AGN).
For example, UltraFast Outflows (UFOs) produce highly blue-shifted absorption
lines, and clumpy absorbers explain soft X-ray variability.
We investigated their spectral structures and variations for three super-Eddington
AGNs with strong UFOs (IRAS 13224-3809, 1H 0707-495, and PDS 456).
As a result, we found that clumpy absorbers have outflow velocities
comparable to or larger than those of UFOs.
We also found a positive correlation between the X-ray flux and both velocities.
This result can be interpreted that a clumpy absorber created
by the instability of the continuum-driven UFO is accelerated
by an additional UV line-driven effect due to the reduced ionization parameter.
This study suggests that UV line-driven outflows are affected even
for super-Eddington sources and that the mechanical energy
of the outflows is much higher than previously assumed,
i.e., AGN feedback is stronger than previously assumed.
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