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Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1039..329b&link_type=abstract
PARTICLE ACCELERATION AND TRANSPORT IN THE HELIOSPHERE AND BEYOND: 7th Annual International Astrophysics Conference. AIP Confer
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1
Particle Emission, Solar Wind, Planetary Bow Shocks, Interplanetary Shocks, Interplanetary Magnetic Fields, Mhd Waves, Plasma Waves, Turbulence, Neutrino, Muon, Pion, And Other Elementary Particles, Cosmic Rays
Scientific paper
At least 5 crossings of the termination shock (TS) were observed in the magnetic field observations by Voyager 2 (V2), consistent with ripples propagating on the TS. Two merged interactions associated with an end to the recovery of cosmic ray intensity were observed in the solar wind during 2007. An increase in the magnetic field strength B was also observed ~25 days prior to the TS crossings in association with a decrease in the solar wind speed and an increase in the intensity of >0.5 MeV particles. The internal TS structure changed on 3 successive crossings, consistent with a local shock reformation process on a scale of a few hours. One TS crossing was a supercritical perpendicular shock, B2/B1 = 1.7+/-0.1, a ramp of thickness ~1 c/ωpi, and oscillations in the ramp. A Gaussian distribution of 48 sec averages of B was observed during a 19 day interval behind the TS. This might be a consequence of the Central Limit Theorem, related to the extreme nonlinearity and variability of the B(t) on a scale of several hours.
Acuña Mario Humberto
Burlaga Leonard Francis
Ness Norman F.
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