Implications of the Voyager-1 particle spectra for acceleration at the termination shock

Details Implications of the Voyager-1 particle spectra for acceleration at the termination shock Implications of the Voyager-1 particle spectra for acceleration at the termination shock

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..858..171k&link_type=abstract

PHYSICS OF THE INNER HELIOSHEATH: Voyager Observations, Theory, and Future Prospects; 5th Annual IGPP International Astrophysics

Astronomy and Astrophysics

Astrophysics

4

Composition, Energy Spectra And Interactions, Particle Acceleration, Heliopause And Solar Wind Termination, Planetary Bow Shocks, Interplanetary Shocks

Scientific paper

We interpreted the precursor events observed by Voyager-1 2002-2004 in terms of the magnetic field line's crossing and re-crossing the shock between V-1 and the Sun, which may occur for a number of plausible reasons. We discuss the implications of such multiple intersection in the light of new findings of V-1 since crossing the shock in December 2004. We address the effects on the energy spectra and spatial variation, and stress that the shock will not produce a uniform power-law everywhere. Instead, a two-population spectrum, similar to that observed by Voyager-1, can be expected if field lines cross and recross the shock. The two-population spectra observed by V-1 can be interpreted as a signature of acceleration at different sites of the termination shock.

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