Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh51b..03c&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SH51B-03
Physics
2104 Cosmic Rays, 2114 Energetic Particles (7514), 2124 Heliopause And Solar Wind Termination
Scientific paper
Voyager 1 (V1) continues to explore the heliosheath after crossing the solar wind termination shock on 16 December 2004. The source of the classic anomalous cosmic rays (ACRs) was not located at the shock where V1 crossed (~34 N heliolatitude); however, the ACR energy spectra are unfolding towards the expected source spectral shape as V1 moves deeper into the heliosheath. Voyager 2 (V2) contines to see sporadic beams of particles coming from the termination shock, suggesting that soon it will cross the shock as well. The ACR spectrum at V2 is very similar to what V1 observed just as it crossed the shock, implying that the source spectrum of ACRs will not be observed at the V2 crossing site (~27 S) either. The energy spectra of low-energy protons from both spacecraft show evidence of injection into the diffusive shock acceleration process near 1 MeV. This work was supported by NASA under contract NAS7-03001.
Cummings Alan C.
Heikkila Bryant C.
Lal Niranjan
McDonald Frank B.
Stone Edward C.
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