EDP Sciences

Power requirements for cosmic ray propagation models involving diffusive reacceleration

Vol. 597
In section 2. Astrophysical processes

Power requirements for cosmic ray propagation models involving diffusive reacceleration; estimates and implications for the damping of interstellar turbulence

by L. O'C. Drury & A. W. Strong A&A 597, A117


This paper presents a surprisingly efficient physical process for diffusively accelerating cosmic ray particles . In this process, interstellar turbulence suffices to produce a substantial fraction of the cosmic ray energy in the Galaxy. Under very reasonable physical conditions, this acceleration may also be a previously unconsidered mechanism for damping the same turbulence on scales well above the diffusive subscale. This proposal is tested using GALPROP modeling, and can be easily incorporated in other particle propagation codes.