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Near-infrared integral-field spectroscopy of redshifted [O III], H\u3b2, and optical continuum emission from the z = 3.8 radio galaxy 4C+41.17 is presented, obtained with the laser-guide-star adaptive optics facility on the Gemini North telescope. Employing a specialized dithering technique, a spatial resolution of 0\u2033.10, or 0.7 kpc, is achieved in each spectral element, with a velocity resolution of \u223c70 km s-1. Spectra similar to local starbursts are found for bright knots coincident in archival Hubble Space Telescope ( HST) rest-frame ultraviolet images, which also allows a key line diagnostic to be mapped together with new kinematic information. There emerges a clearer picture of the nebular emission associated with the jet in 8.3 GHz and 15 GHz Very Large Array maps, closely tied to a Ly\u3b1-bright shell-shaped structure seen with HST. This supports a previous interpretation of that arc tracing a bow shock, inducing \u223c1010-11 M\u2299 star formation regions that comprise the clumpy broadband optical/ultraviolet morphology near the core.Peer reviewed: YesNRC publication: Ye

A STAR-FORMING SHOCK FRONT IN RADIO GALAXY 4C+41.17 RESOLVED WITH LASER-ASSISTED ADAPTIVE OPTICS SPECTROSCOPY