Radio Galaxy 3C 230 Observed with Gemini Laser-Adaptive-Optics
  Integral-Field Spectroscopy
  The Altair laser-guide-star adaptive optics facility combined with the
Near-Infrared Integral Field Spectrometer (NIFS) on Gemini North have been
employed to study the morphology and kinematics of 3C 230 at z=1.5, the first
such observations of a high-redshift radio galaxy. These suggest a bi-polar
outflow spanning 0"9 (~16 kpc projected distance for a standard lambda-CDM
cosmology) reaching a mean relative velocity of 235 km/s in redshifted H-alpha
+ [NII] and [SII] emission. Structure is resolved to 0"1 (0.8 kpc), well
correlated with optical images from the Hubble Space Telescope and Very Large
Array radio maps obtained at similar spatial resolution. Line diagnostics
suggest that over the 10^7 yr to 10^8 yr duration of its AGN activity, gas has
been ejected into bright turbulent lobes at rates comparable to star formation,
although constituting perhaps only 1 percent of the baryonic mass in the
galaxy.
