  Multi-line imaging of the nearby disk galaxy NGC 1482 with the Taurus Tunable
Filter (TTF) on the Anglo-Australian Telescope reveals a remarkable
hourglass-shaped [N II] 6583/H-alpha excitation structure suggestive of a
galactic wind extending at least 1.5 kpc above and below the disk of the host
galaxy. Long-slit spectroscopy confirms the existence of a large-scale outflow
in this galaxy. The entrained wind material has [N II] 6583/H-alpha ratios in
excess of unity while the disk material is characterized by H II region-like
line ratios indicative of a starburst. Expansion velocities of order 250 km/s
are detected in the wind material, and a lower limit of 2 x 10^{53} ergs is
derived for the kinetic energy of the outflow based on the gas kinematics and
the amount of ionized material entrained in the outflow. This is the first time
to our knowledge that a galactic wind is discovered using excitation maps. This
line ratio technique represents a promising new way to identify wind galaxy
candidates before undergoing more time-consuming spectroscopic follow-ups. This
method of selection may be particularly useful for samples of galaxies at
moderate redshifts.
