Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Heating and Acceleration of Intracluster Medium Electrons by Turbulence   In this paper we investigate the feasibility of bremsstrahlung radiation from
`nonthermal' electrons as a source of hard X-rays from the intracluster medium
of clusters of galaxies. With an exact treatment of the Coulomb collisions in a
Fokker-Planck analysis of the electron distribution we find that the severe
difficulties with lifetimes of `nonthermal' particles found earlier by
Petrosian (2001) using a cold target model remain problematic. We then address
possible acceleration of background electrons into a nonthermal tail. We assume
a simplified but generic acceleration rate and determine the expected evolution
of an initially Maxwellian distribution of electrons. We find that strong
nonthermal components arise only for rapid rate of acceleration which also
heats up the entire plasma. These results confirm the conclusion that if the
observed `nonthermal' excesses are due to some process accelerating the
background thermal electrons this process must be short lived.

12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex