Mass Transfer and Disk Dynamics
  in Close Binary Systems

   John M. Blondin
   North Carolina State University


The formation of a tidal stream via Roche-Lobe Overflow and the interaction of such a stream with a quiescent accretion disk around a compact companion is studied with a three-dimensional time-dependent hydrodynamical model that includes both the donor star (with a fixed gravitational potential) and the accretion disk in a co-rotating system. The mass ratio of this system is 0.67.


The image on the right shows a close-up of the disk. The image is made up of multiple iso-density surfaces, with the lower density surfaces rendered semi-transparent. A time animation from this fixed view is available in either MPEG-4 or QuickTime format.

disk2ta.mp4 (6.5 MB)

disk2ta.mov (9.9 MB)


The next image, on the left, shows more of the binary system. This time animation includes the orbital motion of the system. The animation starts out at a large distance and slowly zooms in over 1.25 orbits.

disk3t.mov (QuickTime 79 MB)