Highly nonlinear magnetic pulses at Comet Giacobini-Zinner

Details Highly nonlinear magnetic pulses at Comet Giacobini-Zinner Highly nonlinear magnetic pulses at Comet Giacobini-Zinner

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..757t&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, May 1990, p. 757-760.

Physics

15

Electromagnetic Pulses, Giacobini-Zinner Comet, Solar Wind, Solitary Waves, Bow Waves, Circular Polarization, Compression Ratio, Magnetic Fields, Nonlinearity, Shock Waves, Comets, Giacobini-Zinner, Magnetic Properties, Waves, Polarization, Magnetic Fields, Solar Wind, Velocity, Bow Shock, Hypotheses, Plasma, Ice Mission, Spacecraft Observations, Compression

Scientific paper

Nonlinear solitary magnetic pulses have been detected near the outbound bow shock/wave of Comet Giacobini-Zinner. The pulses have peak field-to-background compression ratios ranging from 2.3 to 7.0 and full-width half-maximum durations from 12 to 72s, comparable to the H2O group ion gyroperiod. Because all of the solitary waves have the same spacecraft-frame polarizations, it is suggested that the waves may have phase speeds greater than the solar wind speed. The role that the waves may play with the bow shock is discussed briefly.

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