Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Alfvenic reacceleration of relativistic particles in galaxy clusters in
  the presence of secondary electrons and positrons   In a previous paper (Brunetti et al. 2004) we presented the first
self-consistent calculations of the time-dependent coupled equations for the
electrons, hadrons and Alfv\'en waves in the intracluster medium, which
describe the stochastic acceleration of the charged particles and the
corresponding spectral modification of the waves. Under viable assumptions,
this system of mutually interacting components was shown to accurately describe
several observational findings related to the radio halos in clusters of
galaxies. In this paper, we add to the self-consistency of the calculations by
including the generation and re-energization of secondary electrons and
positrons, produced by the inelastic interactions of cosmic rays with the
thermal gas in the intracluster medium. The bulk of Cosmic rays is expected to
be confined within the cluster volume for cosmological times, so that the rate
of production of secondary electrons, as well as gamma rays, may become
correspondingly enhanced. If MHD waves are present, as it may be expected in
the case of a recent merger event, then the reacceleration of secondary
electrons and positrons can significantly affect the phenomenology of the non
thermal processes in clusters. We investigate here these effects for the first
time.

23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con