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Aperture Synthesis Observations of NH3 and CS in Orion-KL

  • Y. Murata (a1), R. Kawabe (a2), M. Ishiguro (a2), T. Hasegawa (a3), T. Takano (a2), T. Kasuga (a2), K.-I. Morita (a2) and M. Hayashi (a1)...

Abstract.

We have made aperture synthesis maps of Orion-KL in NH3(1,1),(2,2) and CS(J=l-0) emissions using the Nobeyama Millimeter Array. Both NH3 and CS maps show new detailed structures that have not been recognized before. Two NH3 filaments in the size of ~0.45 pc x0.04 pc are found extending to the northwest direction of Orion-KL. These filaments are associated with the HH objects and the finger-like H2 emissions; they are probably formed through the interaction with high velocity, highly channeled winds from the KL region. The CS maps show, on the other hand, shell structures around IRc2 as well as the well-known rotating disk. These shells coincide with the two lobes of the shock-excited H2 emission, being interpreted as the shock-compressed shells of ambient molecular gas interacting with the outflow from IRc2.

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