Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solar Energetic Particle Acceleration by a Shock Wave Accompanying a
  Coronal Mass Ejection in the Solar Atmosphere   Solar energetic particles acceleration by a shock wave accompanying a coronal
mass ejection (CME) is studied. The description of the accelerated particle
spectrum evolution is based on the numerical calculation of the diffusive
transport equation with a set of realistic parameters. The relation between the
CME and the shock speeds, which depend on the initial CME radius, is
determined. Depending on the initial CME radius, its speed, and the magnetic
energy of the scattering Alfven waves, the accelerated particle spectrum is
established during 10-60 minutes from the beginning of CME motion. The maximum
energies of particles reach 0.1-10 GeV. The CME radii of 3-5 $R_\odot$ and the
shock radii of 5-10 $R_\odot$ agree with observations. The calculated particle
spectra agree with the observed ones in events registered by ground-based
detectors if the turbulence spectrum in the solar corona significantly differs
from the Kolmogorov one.

10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
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The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
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The categories of this paper are: econ
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con