"Dark matter" in accretion disks (2008)
Howell, Steve B., Hoard, D. W., Brinkworth, C., Kafka, S., Walentosky, M. J., Walter, Frederick M., ...
Using Spitzer Space Telescope photometric observations of the eclipsing, interacting binary WZ Sge, we have discovered that the accretion disk is far more complex than previously believed. Our 4.5...