  Binary stars can interact via mass transfer when one member (the primary)
ascends onto a giant branch. The amount of gas ejected by the binary and the
amount of gas accreted by the secondary over the lifetime of the primary
influence the subsequent binary phenomenology. Some of the gas ejected by the
binary will remain gravitationally bound and its distribution will be closely
related to the formation of planetary nebulae. We investigate the nature of
mass transfer in binary systems containing an AGB star by adding radiative
transfer to the AstroBEAR AMR Hydro/MHD code.
