Schematic of mass loss via isotropic reemission. The equipotential surface (dotted curve) is shown in the corotating frame of the binary system. The thick plus sign represents the system’s center of mass, and the thick cross represents the location of the L₁ point through which the donor transfers mass to the accretor. The mass that is not accreted is ejected isotropically from the vicinity of the accretor as indicated by the red arrows.