Chemical abundances in Seyfert galaxies -- V. The discovery of shocked
  emission outside the AGN ionization axis
  We present maps for the electron temperature in the inner kpc of three
luminous Seyfert galaxies: Mrk 79, Mrk 348, and Mrk 607 obtained from Gemini
GMOS-IFU observations at spatial resolutions of 110-280 pc. We study the
distributions of electron temperature in active galaxies and find temperatures
varying in the range from 8000 to >30000 K. Shocks due to gas outflows play an
important role in the observed temperature distributions of Mrk 79 and Mrk 348,
while standard photoionization models reproduce the derived temperature values
for Mrk 607. In Mrk 79 and Mrk 348, we find direct evidence for
shock-ionization with overall orientation orthogonal to the ionization axis,
where shocks can be easily observed as the AGN radiation field is shielded by
the nuclear dusty torus. This also indicates that even when the ionization
cones are narrow, the shocks can be much wider-angle.
