The Composition of Anomalous Cosmic Rays and Other Heliospheric Ions from Voyager Observations

Details The Composition of Anomalous Cosmic Rays and Other Heliospheric Ions from Voyager Observations The Composition of Anomalous Cosmic Rays and Other Heliospheric Ions from Voyager Observations

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsh31b..06c&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SH31B-06

Other

7514 Energetic Particles (2114), 2104 Cosmic Rays, 2114 Energetic Particles, Heliospheric (7514), 2152 Pickup Ions

Scientific paper

We present a new table of the abundances of anomalous cosmic rays (ACRs) derived from Voyager observations over the period 1993/53 - 1999/365. We find that interstellar neutral gas entering the heliosphere and becoming pickup ions accelerated at the solar wind termination shock can account for the observed ACR intensities of H, He, N, O, Ne, and Ar. However, the expected interstellar neutral densities of C, Na, Mg, Si, and S appear to be too low to account for the ACR energy spectra of these elements, suggesting that another source of pickup ions is present in the heliosphere. This work was supported by NASA under contract NAS7-1407.

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