Beta Lyrae is an interacting and eclipsing binary where material is gravitationally pulled away from one star and accretes on to the surface of the companion. The system has an orbital period of 13 days. Using the CHARA Array, researchers obtained images of beta Lyrae showing the mass donor and the thick disk surrounding the mass gainer. The donor is brighter and appears elongated; this is the first direct detection of photospheric tidal distortion due to Roche lobe filling. The disk component is fainter and more elongated than the donor.
Reference:
First Resolved Images of the Eclipsing and Interacting Binary β Lyrae
Zhao et al. 2008, 684, 95