Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apjs...85..411r&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 85, no. 2, p. 411-432.
Astronomy and Astrophysics
Astrophysics
28
Interplanetary Medium, Ion Motion, Satellite Observation, Satellite-Borne Instruments, Solar Flux Density, Solar Wind, Explorer 50 Satellite, International Sun Earth Explorers
Scientific paper
Bidirectional energetic ion flows (BIFs) in the solar wind at 1AU during 1973-1991 are examined on the basis of about 1 MeV/amu data from the Goddard Space Flight Center instruments on ISEE3/ICE and IMP 8. BIFs are observed more frequently around solar maximum, when they are observed about 12 percent of the time compared with about 5 percent at solar minimum. Intervals with durations greater than 4 hr are observed on average approximately every 3-4 d at solar maximum and every 2 wk at solar minimum, with about 33 percent of these intervals following within 2 d of an interplanetary shock. Various coronal mass ejection signatures and BIFs greater than 1 MeV/amu usually do not coincide exactly, and additional bidirectional ion events are identified.
Reames Donald. V.
Richardson Ian G.
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