I just watched an interesting minidoc about cosmic radiation. The video, and other resources I've read afterward, explains that the most energetic cosmic radiation comes from supernovae and black holes. Our sun also bombards us with particles, but these are lower energy. These sources imply that interstellar particles are higher energy because they come from high energy events (stars exploding or imploding).
I wonder if the high energy of these interstellar particles might also be a consequence of our solar system's movement relative to other stars. If the origin of a cosmic ray is a star that is traveling very fast relative to our own system, perhaps this would significantly increase the energy of the particle as we experience it. Alternatively, the relative movement of distant stars to our own may be a drop in the bucket compared to the energy imparted to a ray by the implosion/explosion of a star.
My question is this: does the relative movement of the point of origin for a cosmic ray have a significant impact on that ray's energy as we experience it here on earth, or is this effect dwarfed by the power imparted on particles by the effects of the black holes and super novae that generate them?