Statistics
Scientific paper
Jun 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sowi.conf...75m&link_type=abstract
NASA Goddard Space Flight Center, International Solar Wind 8 Conference, p. 75
Statistics
Electron Plasma, Magnetic Fields, Plasma Frequencies, Electrostatic Waves, Radio Bursts, Latitude, Radio Receivers, Ulysses Mission, Plasma Density
Scientific paper
The radio and plasma wave receivers on the Ulysses spacecraft have detected thousands of short-duration bursts of waves at approximately the electron plasma frequency. These wave events believed to be Langmuir waves are usually less than approximately 5 minutes in duration. They occur in or at the boundaries of depletions in the magnetic field amplitude known as magnetic holes. Using the 16 sec time resolution provided by the plasma frequency receiver, it is possible to examine the density structure inside of magnetic holes. Even higher time resolutions are sometimes available from the radio receiver data. The Ulysses observations show that these wave bursts occur more frequently at high heliographic latitudes; the occurrence rates depend on both latitude and distance from the Sun. We review the statistics for the wave events, compare them to magnetic and plasma parameters, and review the reasons for the more frequent occurrence at high heliographic latitudes.
Balogh André
Forsyth Robert J.
Kellogg Paul J.
Lin Nan
Macdowall Robert J.
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