Computer Science
Scientific paper
Aug 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icrc...10...30c&link_type=abstract
IN: International Cosmic Ray Conference, 18th, Bangalore, India, August 22-September 3, 1983, Late Papers. Volume 10 (A85-22801
Computer Science
Annual Variations, Energy Spectra, Galactic Cosmic Rays, Helium, Oxygen, Solar Activity Effects, Anomalies, Voyager 1 Spacecraft, Voyager 2 Spacecraft
Scientific paper
Data from the cosmic ray experiment on Voyagers 1 and 2 have been used to examine anomalous O and He in the time period from launch in 1977 to mid-1982. Several time periods where large periodic (typically 26 day) temporal variations of O between 5-15 MeV/nuc are present, are found with variations in intensity by up to a factor of 10. On the longer term, there is a sharp drop the anomalous O intensity relative to the galactic cosmic ray components in near the middle of 1980. After the decrease evidence is still found at about 10 AU for the presence of anomalous O and He near the time of maximum modulation. Data from a larger fraction of the solar cycle will be required before it can be determined whether the intensity of the anomalous component is lower in the second half of the cycle (after the solar field reversal) than in the first half.
Cummings Alan C.
Mewaldt Richard A.
Webber William R.
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