Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic-ray propagation around the Sun: investigating the influence of
  the solar magnetic field on the cosmic-ray Sun shadow   The cosmic-ray Sun shadow, which is caused by high-energy charged cosmic rays
being blocked and deflected by the Sun and its magnetic field, has been
observed by various experiments, such as Argo-YBJ, HAWC, Tibet, and IceCube.
Most notably, the shadow's size and depth was recently shown to correlate with
the 11-year solar cycle. The interpretation of such measurements, which help to
bridge the gap between solar physics and high-energy particle astrophysics,
requires a solid theoretical understanding of cosmic-ray propagation in the
coronal magnetic field. It is the aim of this paper to establish theoretical
predictions for the cosmic-ray Sun shadow in order to identify observables that
can be used to study this link in more detail. To determine the cosmic-ray Sun
shadow, we numerically compute trajectories of charged cosmic rays in the
energy range of 5-316 TeV for five different mass numbers. We present and
analyze the resulting shadow images for protons and iron, as well as for
typically measured cosmic-ray compositions. We confirm the observationally
established correlation between the magnitude of the shadowing effect and both
the mean sunspot number and the polarity of the magnetic field during the solar
cycle. We also show that during low solar activity, the Sun's shadow behaves
similarly to that of a dipole, for which we find a non-monotonous dependence on
energy. In particular, the shadow can become significantly more pronounced than
the geometrical disk expected for a totally unmagnetized Sun. For times of high
solar activity, we instead predict the shadow to depend monotonously on energy,
and to be generally weaker than the geometrical shadow for all tested energies.
These effects should become visible in energy-resolved measurements of the Sun
shadow, and may in the future become an independent measure for the level of
disorder in the solar magnetic field.

10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat