Near-tail reconnection as the cause of cometary tail disconnections

Details Near-tail reconnection as the cause of cometary tail disconnections Near-tail reconnection as the cause of cometary tail disconnections

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.1417r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Feb. 1, 1986, p. 1417-1423.

Astronomy and Astrophysics

Astronomy

42

Astronomical Models, Comet Tails, Magnetic Field Reconnection, Plasma Dynamics, Plasma Interactions, Solar Wind Velocity, Comet Nuclei, Interplanetary Magnetic Fields, Mach Number, Magnetohydrodynamic Waves, Shock Waves, Comets, Comet Tails, Plasma, Comae, Acceleration, Magnetic Properties, Ejection, Magnetic Effects, Shock Effects, Models

Scientific paper

In a cometary tail disconnection event the plasma tail appears to separate from the coma and to accelerate away from it. As this occurs a new tail begins to form. The authors propose that these disconnections arise in a manner analogous to geomagnetic substorms, i.e., by the formation of a strongly reconnecting region in the near tail that forms a magnetic island in the coma and ejects the plasma tail by strengthening the magnetic "slingshot" within the tail. This reconnection process may be triggered by several different processes, such as interplanetary shocks or variations in the Alfvén Mach number.

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