Evidence of Dynamical Variations in the Termination Shock

Details Evidence of Dynamical Variations in the Termination Shock Evidence of Dynamical Variations in the Termination Shock

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh12c..04s&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH12C-04

Physics

2104 Cosmic Rays, 2124 Heliopause And Solar Wind Termination

Scientific paper

In the vicinity of the termination shock, changes in the spectra of anomalous cosmic ray (ACR) He and O ions will reflect changes in the location of the shock and in the intensity of ACRs at the shock where they are accelerated. Comparing the evolution of the ACR spectra at Voyager 1 and 2 over the last two years indicates the shock has moved inward during that time while the ACR source intensity at the shock increased. This is consistent with the recovery of the shock from a collision with a Merged Interaction Region in early 2001 as modeled by Zank and Mueller and Jokipii et al. and suggests that the termination shock is likely very dynamic with transient motions of several AU driven by collisions with regions of high pressure solar wind. This work was supported by NASA under contract NAS7-1407.

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