On the folding phenomenon of comet tail rays

Details On the folding phenomenon of comet tail rays On the folding phenomenon of comet tail rays

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.198..297e&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 198, Jan. 1982, p. 297-302.

Astronomy and Astrophysics

Astronomy

11

Comet Tails, Electric Fields, Interplanetary Magnetic Fields, Solar Wind, Earth Ionosphere, Polar Coordinates, Velocity Distribution, Comets, Comet Tails, Magnetic Fields, Electric Fields, Comae, Plasma, Solar Wind, Morphology, Rays, Mathematical Models, Ionosphere, Flow, Formation, Velocity, Streamers, Observations, Pressure, Density, Electrodynamics

Scientific paper

It is shown that the folding phenomenon of the comet tail rays is compatible with the Ferraro isorotation law if the comet tail magnetic field has no azimuthal component, that is, Bphi (the polar angle) equals zero. Considering electric drift due to convectional electric fields, a formula is obtained for the angular rate of a ray closure which reduces to that of Ness and Donn (1966) if the velocity profile across the tail is linear. The magnetic field B of approximately 20-40 gammas in the coma and less than about 10 gammas in the distant tail is estimated under typical solar wind conditions at 1 AU.

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