# Is the Unruh radiation isotropic?

The Unruh effect is the prediction that what appears to be a Minkowski vacuum to an inertial observer, would appear to be a thermal bath of particles to an observer accelerating uniformly in the same spacetime. My question is: does the accelerating observer see an isotropic blackbody distribution? As he is accelerating in a certain direction, he would be breaking isotropy. Does this not matter?

Thanks.

-