OBSERVATIONS OF SHOCKED H-2 AND [FEII] LINE-PROFILES IN ORION BULLET WAKES

New observations of Hz velocity profiles in the Orion bullet wakes are extremely difficult to reconcile with existing steady-state shock mod els. We have observed [FeII] 1.644 mu m velocity profiles of selected bullets and H-2 1-0 S(1) 2.122 mu m velocity profiles for a series of positions along and across the corresponding bow-shock wakes. Integrat ed [FeII] velocity profiles of the brightest bullets are consistent wi th theoretical bow shock predictions. Observations of broad, singly-pe aked H-2 1-0 S(1) profiles in the most clearly resolved bullet wakes c hallenge our understanding of molecular shocks. It may be necessary to model the effects of instabilities and turbulence in the Orion bullet wakes in order to fit our observations.