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We present VLA 1.3 cm radio continuum and water maser observations as well asSMA SO$_2$ (226.300 GHz) and 1.3 mm dust continuum observations toward themassive star formation region IRAS 16547-4247. We find evidence of multiplesources in the central part of the region. There is evidence of a rotatingstructure associated with the most massive of these sources, traced at smallscales (~50 AU) by the water masers. At large scales (~1000 AU) we find avelocity gradient in the SO2 molecular emission with a barely resolvedstructure that can be modeled as a rotating ring or two separate objects. Thevelocity gradients of the masers and of the molecular emission have the samesense and may trace the same structure at different size scales. The positionangles of the structures associated with the velocity gradients are roughlyperpendicular to the outflow axis observed in radio continuum and severalmolecular tracers. We estimate the mass of the most massive central source tobe around 30 solar masses from the velocity gradient in the water maseremission. The main source of error in this estimate is the radius of therotating structure. We also find water masers that are associated with thelarge scale molecular outflow of the system, as well as water masers that areassociated with other sources in the region. Our results suggest that theformation of this source, one of the most luminous protostars or protostellarclusters known, is taking place with the presence of ionized jets and disk-likestructures.

The Rotating Molecular Structures and the Ionized Outflow Associated with IRAS 16547-4247