Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...479l..71y&link_type=abstract
Astrophysical Journal Letters v.479, p.L71
Astronomy and Astrophysics
Astronomy
8
Infrared: Stars, Ism: Clouds, Ism: Globules, Ism: Individual Name: Sandqvist 136, Ism: Jets And Outflows, Stars: Formation, Stars: Mass Loss
Scientific paper
We present a study of the morphological aspects of H2 jets and knots seen toward the small dark cloud Sandqvist 136. Near-infrared images of 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 presence 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 associated with Sandqvist 136. Near-infrared jets and knots were found positionally associated with the high-velocity molecular outflow. The knots seem to be tracing the walls of a cavity excavated by the molecular outflow. Unlike most outflows commonly associated with class 0 sources, the outflow associated with this source appears to be poorly collimated.
Clemens Dan P.
Moreira Miguel C.
Santos Nuno Cardoso
Yun Joao Lin
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