Figure 7a. 1992 and 1995 MERLIN maps of WR147 from which variations in both the thermal and non-thermal components can be derived. The thermally-emitting Wolf-Rayet star is to the south. A complementary HST image at similar resolution reveals a B-type star above the (non-thermal) northern feature where the two winds collide.


Figure 7b. A model of the WR147 colliding wind system.