The comet tail magnetic field - Large or small

Details The comet tail magnetic field - Large or small The comet tail magnetic field - Large or small

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184..755e&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 184, Sept. 1978, p. 755-758. Research supported by the United States-Is

Astronomy and Astrophysics

Astronomy

11

Comet Tails, Field Strength, Interplanetary Magnetic Fields, Magnetic Effects, Magnetic Fields, Drift Rate, Kelvin-Helmholtz Instability, Magnetic Flux, Solar Wind, Magnetic Fields, Comet Tails, Pressure, Plasmas, Solar Wind, Equilibrium

Scientific paper

Observations of the folding rate of the tail rays are shown to be indicative of a small magnetic field in type 1 comet tails, of the order of the interplanetary magnetic field or less. Equilibrium pressure balance across the tail yields a maximum magnetic field of about 10 gammas (at 1 AU) throughout the tail cross section. Observations of helical waves also result in the same magnetic-field values. Arguments in favor of substantial amplification of the solar-wind magnetic field in the cometary tails are shown to be unconvincing.

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