Reconnection at the Heliopause and the Motion of Energetic Particles in the Outer Heliosphere

Details Reconnection at the Heliopause and the Motion of Energetic Particles in the Outer Heliosphere Reconnection at the Heliopause and the Motion of Energetic Particles in the Outer Heliosphere

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh11b1924s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH11B-1924

Astronomy and Astrophysics

Astrophysics

[2124] Interplanetary Physics / Heliopause And Solar Wind Termination, [2126] Interplanetary Physics / Heliosphere/Interstellar Medium Interactions, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7526] Solar Physics, Astrophysics, And Astronomy / Magnetic Reconnection

Scientific paper

At the heliopause the uni-directional interstellar magnetic field abuts the piled-up sectored magnetic field and multiple current sheets of the heliosheath. Reconnection of these fields provides a natural pathway for energetic particles (e.g., anomalous cosmic rays produced in the heliosphere and galactic cosmic rays produced outside) to move across the heliopause. Here we report on 2D particle-in-cell simulations of this system that self-consistently include a small number of energetic particles designed to mimic these energetic particles. Reconnection occurs at multiple current layers within the heliosheath and leads to the formation of a bath of magnetic bubbles. By tracing the trajectories of energetic particles through this bath we show that their propagation acquires some characteristics of a random walk. We discuss the implications for this behavior on the detection and propagation of energetic particles throughout the outer heliosphere.

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