A New Diagnostic to Separate Line Emission from Star Formation, Shocks,
  and AGN Simultaneously in IFU Data
  In the optical spectra of galaxies, methods for the separation of line
emission arising from star formation and an additional hard component, such as
shocks or AGN, is well-understood and possible with current diagnostics.
However, such diagnostics fail when attempting to separate and define line
emission which arises from shocked gas, and that arising from AGN. We present a
new three-dimensional diagnostic diagram for IFU data which can simultaneously
separate the line emission amongst star formation, shocks, and AGN within a
galaxy. We show that regions we define as AGN-dominated correlate well with the
hard X-ray distribution in our test case NGC 1068, as well as with known
regions of AGN activity in NGC 1068. Similarly, spaxels defined as
shock-dominated correlate strongly with regions of high velocity dispersion
within the galaxy.
