Title: The Dynamical Role of Radiative Driving in the Sources and Sinks of Circumstellar Matter

Abstract:
The high luminosity of massive stars drives strong stellar wind outflows. In magnetic massive stars, the channeling and 
trapping of wind material can feed a circumstellar magnetosphere. In the non-magnetic, but rapidly rotating Be stars, direct 
centrifugal ejection of material from the equatorial surface can feed a Keplerian decretion disk, with radiative forces now 
instead playing a potentially key role in disk dissipation, through line-driven ablation from the disk surface. This talk will review 
these dynamical roles of radiative driving in the sources and sinks of circumstellar matter, within the context of using high 
resolution observations to test and constrain circumstellar models.