Cosmic-Ray H and He Isotopes in the Outer Heliosphere in 1994

Details Cosmic-Ray H and He Isotopes in the Outer Heliosphere in 1994 Cosmic-Ray H and He Isotopes in the Outer Heliosphere in 1994

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...451l..33s&link_type=abstract

Astrophysical Journal Letters v.451, p.L33

Astronomy and Astrophysics

Astronomy

3

Ism: Cosmic Rays, Ism: Abundances

Scientific paper

With the approach of the solar minimum period of cycle 22, the Voyager 1 cosmic-ray data have shown continuous development of a higher flux of low-energy hydrogen. At an average heliocentric distance of 56 AU, the low-energy (<100 MeV) flux is higher than that measured during the 1987 solar minimum at much smaller heliocentric distances, whereas the high-energy (>100 MeV) flux has not quite recovered to that of the 1987 solar minimum. The low-energy 2H/1H ratio is significantly smaller than the previous measurements and the model predictions, while the 2H/3He ratio is consistent with the calculations. This can be explained by an excess of low-energy 1H, which is attributed to the anomalous 1H component.

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