Abstract
A CO J=4-3 map of the Orion-IRc2 region (size 80'', beam 15'') is presented. The outflow has a bipolar structure observed nearly pole-on. We interpret our observations in terms of an hierarchy of ''tubes'' where the fastest gas proceeds through the narrowest, innermost cane: The gas has an inhomogeneous temperature distribution and must be highly clumped. Most of the properties derived comply with the picture developed for the few known extreme high velocity outflows; however, this outflow contains exceptionally dense gas ( > 10(6) cm(-3)).