A 100-pc Scale, Fast and Dense Outflow in Narrow-Line Seyfert 1 Galaxy
  IRAS04576+0912
  We report the initial result of an adaptive-optics assisted, optical
integral-field-unit observation on IRAS04576+0912, the nearest (z=0.039) active
galactic nucleus with a prominent blueshift/tail in [O III] emission from a
sample of such objects that we have collected from the literature. We aim at
addressing the putative quasar-mode feedback process with Subaru/Kyoto 3D
II+AO188. The optical waveband (6400--7500 AA) enables us to measure the gas
density via the [S II] doublets, in contrast to earlier Near-IR studies. Since
the fast [O III] outflow happens only around rapidly growing central black
holes, this object is suitable for investigating the black hole-galaxy
coevolution. The obtained data cube exhibits blue tail in the [S II] emission
at many lenslets. By fitting the spectrum with the high excess flux at the [S
II] blue tail, we find the fast (~ 860 km/s), dense (>3000/cc), wide-angle and
offset outflow in central 100-pc scales. Although the large opening angle and
the high gas outflow-to-accretion ratio may favour the feedback hypothesis, the
inferred kinetic power injection rate of this ionized gas outflow seems
insufficient to influence the whole host galaxy. A conventional assumption of a
low density must have overestimated the feedback process.
