AzTEC observations of 1.1 mm emission from the Orion Nebula

We present a map of the OMC-1 region in the 1.1 mm emission observed with the AzTEC, a new large-format array composed of 144 silicon-nitride micromesh bolometers currently in use at the James Clerk Maxwell Telescope (JCMT). The Orion A molecular cloud is known to be the most important high-mass star-forming region in the Milky Way, and the OMC-1, located in the middle of the Orion A cloud, is especially important to structure the environment. The AzTEC observations of the OMC-1 at 1.1 mm reveal dozens of cloud cores and a tail of filaments in a manner almost identical to the submillimeter continuum emission at 450 and 850 mum of the entire OMC-1 region and coincide with the filaments of ammonia gas. The implication is that the direction of flow is likely to be away from the core of OMC-1 and the dust-clump structures correspond to Jean's length, i.e. thermal fragmentation of the dense filamentary material. With physical properties of the cores in the clumped structures in conjunction with the Spitzer images of the OMC-1, we will discuss new young core candidates which could harbor embedded young stellar objects. This research was supported in part by Korea Science & Engineering Foundation (KOSEF) under a cooperative agreement with the Astrophysical Research Center of the Structure and Evolution of the Cosmos (ARCSEC)