This binary is demonstrably semi-detached and yielded a fairly good photometric mass ratio. Absolute binary properties followed from our loser velocity curve. The ultraviolet solution yielded significant third light from disk Balmer continuum emission. Such light gives a new handle on disk properties, in addition to H-alpha emission profiles. Olson upgraded opacities and integration routines in his non-LTE model of Algol accretion disks, and is exploring disk structure in RX Gem.
Preliminary results account for both H-alpha emission profiles and disk continuum emission.
Using the upgraded Wilson program, new solutions were obtained for S Cnc and DN Ori. Slight underfillings of the loser Roche lobes were verified. Ultraviolet solutions of DN Ori and RW Per also contain disk Balmer emission, which will help in analysis of their disks. Besides symbiotic stars, recent novae, and the occasional planetary nebula, they include a number of cataclysmic-like binaries. As shown by van den Heuvel, et al., the characteristic mass transfer rate is high enough to fuel stable shell burning, without the white dwarf accumulating enough hydrogen to revert to the giant branch.