Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1039..397k&link_type=abstract
PARTICLE ACCELERATION AND TRANSPORT IN THE HELIOSPHERE AND BEYOND: 7th Annual International Astrophysics Conference. AIP Confer
Astronomy and Astrophysics
Astrophysics
2
Astronomical Observations, Particle Acceleration, Heliopause And Solar Wind Termination, Planetary Bow Shocks, Interplanetary Shocks, Convection, Turbulence, And Diffusion, Interplanetary Magnetic Fields
Scientific paper
We present numerical simulations modeling acceleration of ACRs at a blunt termination shock with the spiral field lines intersecting the shock multiple times. The 2-D model includes parallel and perpendicular diffusion. Our results confirm the qualitative expectations: the nose segment of the blunt shock is inefficient to accelerate particles to ACR energies, which results in a continuing increase of the ACR flux and a gradual unfolding of the ACR spectrum behind the shock, as seen by Voyager-1. We also present a simple analytically tractable test-case to illustrate physical effects at a 2-D shock with a structure along the shock-front.
Jokipii Randy J.
Kota József
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