The Galactic Center: Not an Active Galactic Nucleus
  We present 10um-35um Spitzer spectra of the interstellar medium in the
Central Molecular Zone (CMZ), the central 210 pc x 60 pc of the Galactic center
(GC). We present maps of the CMZ in ionic and H2 emission, covering a more
extensive area than earlier spectroscopic surveys in this region. The radial
velocities and intensities of ionic lines and H2 suggest that most of the H2
0-0 S(0) emission comes from gas along the line-of-sight, as found by previous
work. We compare diagnostic line ratios measured in the Spitzer Infrared Nearby
Galaxies Survey (SINGS) to our data. Previous work shows that forbidden line
ratios can distinguish star-forming galaxies from LINERs and AGNs. Our GC line
ratios agree with star-forming galaxies and not with LINERs or AGNs.
