Cosmic rays and the physics of interstellar turbulence Available to Purchase

The transport of cosmic rays in the interstellar medium is reviewed with emphasis on interactions with the turbulent interstellar magnetic field. It is shown that the standard picture of cosmic‐ray transport suggests strongly the existence of a smooth turbulence spectrum of the range of scales between 10¹² and 10¹⁹ cm. This, coupled with observations of radio wave scattering and other direct measurements suggests a smooth, power‐law turbulence spectrum over the range of scales from 10⁹ to 10¹⁹ cm, with the index of the power law being close to that of the Kolomogorov equilibrium subrange. Attributing this to a turbulent cascade leads to severe difficulties. Suggestions for avoiding these difficulties are discussed.