1999/06/30 by J. A. Eilek, Eilek, J. A., J. C. Weatherall +2
Engineering · Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #Laser-induced spectroscopy and plasma #Particle Dynamics in Fluid Flows #Solar and Space Plasma Dynamics #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9906500
5 pages, 4 figures, to appear in "Diffuse Thermal and Relativistic Plasma in Galaxy Clusters", 1999, RIngberg workshop, Germany, MPE-Report
arxiv created 1999/06/30 · openalex publication_date 1999/06/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In situ particle acceleration is probably occuring in cluster radio haloes. This is suggested by the uniformity and extent of the haloes, given that spatial diffusion is slow and that radiative losses limit particle lifetimes. Stochastic acceleration by plasma turbulence is the most likely mechanism. Alfven wave turbulence has been suggested as the means of acceleration, but it is too slow to be important in the cluster environment. We propose, instead, that acceleration occurs via strong lower-hybrid wave turbulence. We find that particle acceleration will be effective in clusters if only a small fraction of the cluster energy density is in this form.