Interacting spiral waves in the Oregonator model of the light-sensitive Belousov-Zhabotinskii reaction.

We study the interaction of meandering spiral waves within the framework of a modified Oregonator model for the light-sensitive Belousov-Zhabotinskii medium. In this medium the local excitation threshold can be controlled by varying the intensity of incident light. At low as well as sufficiently high light intensity we find stable axis-symmetric bound states consisting of two counter-rotating spirals.