High-resolution Near-IR Spectral Mapping with H 2 and [Fe ii] Lines of Multiple Outflows around LkHα 234

Abstract

We present a high-resolution, near-IR spectroscopic study of multiple outflows in the LkH α 234 star formation region using the Immersion GRating INfrared Spectrometer (IGRINS). Spectral mapping over the blueshifted emission of HH 167 allowed us to distinguish at least three separate, spatially overlapped outflows in H 2 and [Fe ii ] emission. We show that the H 2 emission represents not a single jet but rather complex multiple outflows driven by three known embedded sources: MM1, VLA 2, and VLA 3. There is a redshifted H 2 outflow at a low velocity, V LSR 40 km s −1 ), the emission must originate from the jet itself rather than H 2 gas in the ambient medium. Also, position–velocity and excitation diagrams indicate that emission from knot C in HH 167 comes from two different phenomena, shocks and photodissociation.