Solar activity dependence of trans-equatorial ion whistler

Details Solar activity dependence of trans-equatorial ion whistler Solar activity dependence of trans-equatorial ion whistler

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32..955w&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 32, Aug. 1984, p. 955-964.

Mathematics

Probability

Ion Cyclotron Radiation, Ionospheric Ion Density, Magnetospheric Proton Density, Solar Activity Effects, Transequatorial Propagation, Whistlers, Deuterons, Helium Ions, Isis-B, Kp Index, Periodic Variations, Probability Distribution Functions, Solar Terrestrial Interactions

Scientific paper

ISIS-2 satellite time-compressed dynamic spectra are presented which indicate the occurrence probabilities and patterns of transequatorial proton (TEP), deuteron (TED) and helium (TEH) whistlers. While TEPs have a high probability in an active solar period, that of the TEDs is low; TEPs exhibit a strong seasonal variation in quiet solar periods. The minimum occurrence probabilities, which depend on geomagnetic activity, appear at K(p) values of 4-5. The phenomena are explainable in terms of the bouncing surface diagram of multicomponent and inhomogeneous plasmas with varying proton density. The spectral pattern of transequatorial ion whistlers and calculations of an approximate equation with regard to the deuteron effect show that the proton to electron density ratios decrease with increasing solar activity.

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