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We have conducted millimeter interferometric observations of the OrionMolecular Cloud-2 (OMC-2) FIR 6 region at an angular resolution of $\sim$4$\arcsec$ - 7$\arcsec$ with the Nobeyama Millimeter Array (NMA). In the 3.3 mmcontinuum emission we detected dusty core counterparts of the previouslyidentified FIR sources (FIR 6a, 6b, 6c, and 6d), and moreover, resolved FIR 6ainto three dusty cores. The size and mass of these cores are estimated to be1100-5900 AU and 0.19-5.5 M$_{\odot}$, respectively. We found that in the$^{12}$CO ($J$=1--0) emission FIR 6b, 6c, and 6d eject the molecular outflowand that the FIR 6c outflow also exhibits at least two collimated jet-likecomponents in the SiO ($J$=2--1) emission. At the tip of one of the SiOcomponents there appears abrupt increase of the SiO line width ($\sim$ 15 kms$^{-1}$), where the three resolved cores in FIR 6a seem to delineate the tip.These results imply the presence of the interaction and the bowshock frontbetween the FIR 6c molecular outflow and FIR 6a.

publications of the astronomical society of japan

Millimeter- and Submillimeter-Wave Observations of the OMC-2/3 region.  IV Interaction between the Outflow and the Dense Gas in the Cluster Forming  Region of OMC-2 FIR 6