S.V. Marchenko
Departement de physique, Universite de Montreal,
C.P. 6128, Succursale Centre-Ville,
Montreal, Quebec, H3C 3J7, Canada, and Observatoire du mont Megantic
In a close WR+O binary the dense, compact clumps can form in the WR wind. They may penetrate the wind-wind collision zone and reach the photosphere of the O companion. Such events can be detected, providing some constraints on the clump's size and density.