H-2 IMAGING OF SANDQVIST-136 - SHOCKED GAS, JETS, AND KNOTS

We present a study of the morphological aspects of H-2 jets and knots seen toward the small dark cloud Sandqvist 136. Near-infrared images o f this cloud in the J, H, and K bands and in the 2.12 mu m v = 1-0 S(1 ) molecular hydrogen line were obtained. The images reveal the presenc e of a near infrared nebula with a conical shape. The location of the apex of the cone, in the K-band image, coincides with the position of an IRAS Point Source Catalogue source. This source, possibly a class 0 young stellar object, is likely to be the illuminator of the nebula. The position and orientation of the conical nebula coincide with those of the blueshifted lobe of the previously found molecular outflow ass ociated with Sandqvist 136. Near-infrared jets and knots were found po sitionally associated with the high-velocity molecular outflow. The kn ots seem to be tracing the walls of a cavity excavated by the molecula r outflow. Unlike most outflows commonly associated with class 0 sourc es, the outflow associated with this source appears to be poorly colli mated.