Pulsational Mass Ejection in Be Star Disks
  This work explores a Pulsationally Driven Orbital Mass Ejection (PDOME) model for the launching of Classical Be star disks. Under this model, a combination of rapid rotation and non-radial pulsation modes contribute to placing material into the circumstellar environment. Several varieties of non-radial pulsation modes, characterized by their propagation direction and the relative phase of their velocity and density perturbations, are considered. As well, the orbital stability of material launched by such a mechanism is investigated. 
Nathaniel Kee, Stan Owocki, Richard Townsend, Hans-Reinhard M\"uller
astro-ph.SR