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We have obtained multiple data sets from the SMA, PdBI, and IRAM 30m
telescope of the Infrared Dark Cloud IRDC18223-3, the High-Mass
Protostellar Object IRAS18151-1208, and the hot core source IRAS18507+0121
in order to search for clues regarding the role of rotation and disks in
high mass star formation. These three objects allow us to compare the
central-most regions surrounding the embedded continuum source at three
different evolutionary stages of the formation process. Toward all three
regions we see rotational structures perpendicular to the molecular
outflows. Similarities and differences in the evolutionary sequence are
discussed in the context of core and disk evolution. Continuum and line
radiative transfer modeling of the rotational disk-like structures is
currently underway. Having a more complete picture of the evolutionary
process that a massive star experiences will contribute significantly to
the future of massive star formation research.
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