A Three Parsec-Scale Jet-Driven Outflow from Sgr A*
  The compact radio source Sgr A* is coincident with a 4 million solar mass
black hole at the dynamical center of the Galaxy and is surrounded by dense
orbiting ionized and molecular gas. We present high resolution radio continuum
images of the central 3' and report a faint continuous linear structure
centered on Sgr A* with a PA~60 degrees. The extension of this feature appears
to be terminated symmetrically by two linearly polarized structures at 8.4 GHz,
~75" from Sgr A*. A number of weak blobs of radio emission with X-ray
counterparts are detected along the axis of the linear structure. The linear
structure is best characterized by a mildly relativistic jet from Sgr A* with
an outflow rate 10^-6 solar mass per year. The near and far-sides of the jet
are interacting with orbiting ionized and molecular gas over the last 1-3
hundred years and are responsible for a 2" hole, the "minicavity",
characterized by disturbed kinematics, enhanced FeII/III line emission, and
diffuse X-ray gas. The estimated kinetic luminosity of the outflow is
~1.2x10^{41} erg/s, so the interaction with the bar may be responsible for the
Galactic center X-ray flash inferred to be responsible for much of the
fluorescent Fe Kalpha line emission from the inner 100pc of the Galaxy.
