Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Particle acceleration and non-thermal emission from galaxy clusters   The existence and extent of non-thermal phenomena in galaxy clusters is now
well established. A key question in our understanding of these phenomena is the
origin of the relativistic electrons which may be constrained by the modelling
of the fine radio properties of radio halos and of their statistics. In this
paper we argue that present data favour a scenario in which the emitting
electrons in the intracluster medium (ICM) are reaccelerated in situ on their
way out. An overview of turbulent-particle acceleration models is given
focussing on recent time-dependent calculations which include a full coupling
between particles and MHD waves.

13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph