Cosmic ray transport near the Sun
R.D. Strauss, J.P. van den Berg, J.S. Rankin
TL;DR
This paper investigates how diverging magnetic fields near the Sun influence galactic cosmic ray distribution, revealing significant anisotropies within 0.2 astronomical units through analytical and numerical methods.
Contribution
It introduces a simplified analytical model validated by simulations to study cosmic ray behavior close to the Sun, highlighting potential anisotropies.
Findings
Significant cosmic ray anisotropies expected inside 0.2 au
Magnetic focusing/mirroring effects are crucial near the Sun
Validated analytical approach matches numerical simulations
Abstract
The strongly diverging magnetic field lines in the very inner heliosphere, through the associated magnetic focusing/mirroring forces, can, potentially, lead to highly anisotropic galactic cosmic ray distributions close to the Sun. Using a simplified analytical approach, validated by numerical simulations, we study the behaviour of the galactic cosmic ray distribution in this newly explored region of the heliosphere and find that significant anisotropies can be expected inside 0.2 au.
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