2019ApJ...887...69S -
Astrophys. J., 887, 69-69 (2019/December-2)
Discovery of an X-ray quasar wind driving the cold gas outflow in the ultraluminous infrared galaxy IRAS F05189-2524.
SMITH R.N., TOMBESI F., VEILLEUX S., LOHFINK A.M. and LUMINARI A.
Abstract (from CDS):
We present new XMM-Newton and NuSTAR observations of the galaxy merger IRAS F05189-2524, which is classified as an ultraluminous infrared galaxy and optical Seyfert 2 at z = 0.0426. We test a variety of spectral models that yield a best fit consisting of an absorbed power law with emission and absorption features in the Fe K band. Remarkably, we find evidence for a blueshifted Fe K absorption feature at E = 7.8 keV (rest frame) which implies an ultrafast outflow (UFO) with vout = 0.11 ± 0.01c. We calculate that the UFO in IRAS F05189-2524 has a mass outflow rate of {dot}Mout ≳1.0 M☉ yr–1, a kinetic power of {dot}EK≳8% LAGN, and a momentum rate (or force) of {dot}Pout ≳1.4 LAGN/c. Comparing the energetics of the UFO to the observed multi-phase outflows at kiloparsec scales yields an efficiency factor of f ∼ 0.05 for an energy-driven outflow. Given the uncertainties, however, we cannot exclude the possibility of a momentum-driven outflow. Comparing IRAS F05189-2524 with nine other objects with observed UFOs and large-scale galactic outflows suggests that there is a range of efficiency factors for the coupling of the energetics of the nuclear and galaxy-scale outflows that likely depend on specific physical conditions in each object.
Abstract Copyright:
© 2019. The American Astronomical Society. All rights reserved.
Journal keyword(s):
galaxies: active - galaxies: individual: IRAS F05189-2524 - quasars: absorption lines - X-rays: galaxies
Simbad objects:
10
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