Key points are not available for this paper at this time.
IRASF11119 is an ultra-luminous IR galaxy with post-merger morphology, hosting a type-1 QSO at z=0. 189. Its 2013 Suzaku spectrum shows a prominent Ultra Fast Outflow (UFO) absorption feature (vₒut~0. 25c). In 2021, we obtained the first XMM-Newton long look of the target, coordinated with a simultaneous NuSTAR observation. The new high-quality data allow us to detect at P>99. 8% c. l. multiple absorption features associated with the known UFO. Furthermore, an emission plus absorption feature at 1. 1-1. 3 keV reveals the presence of a blueshifted P-Cygni profile in the soft band. We associate the hard band features with blends of FeXXV and FeXXVI He-Ly and He-Ly line pairs and infer a large column (NH~10^24 cm^-2) of highly ionized (log~5) gas outflowing at vₒut=0. 27c. The 1 keV feature can be associated with a blend of Fe and Ne transitions, produced by a lower column (NH~10^21 cm^-2) and ionization (log~2. 6) gas component outflowing at the same speed. Using a radiative-transfer disk wind model to fit the highly ionized UFO, we derive a large mass outflow rate, comparable with the mass accretion rate (M₎ₔₓ=4. 25 Mₒₔ₍/yr, ~1. 6 M₀₂₂), and kinetic energy and momentum flux among the highest reported in the literature. We measure an extremely low high-energy cut-off (Ec~25 keV). Several other cases in the literature suggest that a steep X-ray continuum may be related to the formation of powerful winds. The lack of a significant momentum boost between the nuclear UFO and the different phases of the large-scale outflow, observed in IRASF11119 and in a growing number of sources with powerful UFOs, can be explained by (i) a momentum-driven expansion, (ii) an inefficient coupling of the UFO with the host ISM, or (iii) by repeated energy-driven expansion episodes with low duty-cycle, that average out on long time-scales.
Lanzuisi et al. (Mon,) studied this question.