Superhumps in Binary Systems and Their Connection to Precessional Spiral   Density Waves
  We consider a mechanism for the formation of superhumps in the TV Col system, based on the possible existence of a precessional spiral wave in the accretion disk of the system. This mechanism can act in binaries with arbitrary component-mass ratios, and our precessional spiral wave model can be applied to explain observed superhumps of all types. 
P.V. Kaygorodov (1), D.V. Bisikalo (1), O.A. Kuznetsov (1,2) and A. A.   Boyarchuk (1)((1)Institute of Astronomy of the Russ...