Velocity structure in the curved jet S187 : SCP 1 (H2)

We describe the velocity structure of the curved outflow S187:SCP 1 (H2). O bservations of the 2.12 mum molecular hydrogen emission were obtained using an IR Fabry-Perot interferometer with a spectral resolution of 24 km s(-1) and a spatial resolution of 1.6 ". The covered region of 3.6' x 3.6' conta ins the entire curved-jet and several H-2 nebulosities, such as the counter -jet candidate, SCP 3 and SCP 4. The kinematics show that the curved jet is centered around a radial velocity of -30 km s(-1) with velocity components spanning 40 km s(-1). On the other hand, knots SCP 3 and 4 and the counter -jet candidate appear red-shifted at velocities -12 to 30 km s(-1). We disc uss whether the observed velocity structure favors the side-wind model or p recession interpretations of the jet curvature.