EPoS Contribution
EPoS Contribution
Early evolution of massive protostellar objects and the search for disks

Cassandra Fallscheer
Max-Planck-Institut für Astronomie, Heidelberg, Germany
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.