Searching for disks in massive star formation

Abstract: We have obtained multiple data sets from the SMA, PdBI, and IRAM
30m telescope of the Infrared Dark Cloud IRDC18223-3 and High-Mass
Protostellar Object IRAS18151-1208 in order to look for clues regarding
the role of rotation and disks in high mass star formation.  Because IRAS
18151-1208 is at a later evolutionary stage than IRDC 18223-3, these two
objects allow us to compare the central-most regions surrounding the
embedded continuum source at two different periods in the formation
process. Toward both regions we see rotational structures perpendicular to
molecular outflows. Similarities and differences will be discussed in the
context of core and disk evolution.