The Structure of Comets' Induced Magnetotails: Remote and in situ Observations

Details The Structure of Comets' Induced Magnetotails: Remote and in situ Observations The Structure of Comets' Induced Magnetotails: Remote and in situ Observations

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1302..225j&link_type=abstract

PICKUP IONS THROUGHOUT THE HELIOSPHERE AND BEYOND: Proceedings of the 9th Annual International Astrophysics Conference. AIP Con

Astronomy and Astrophysics

Astrophysics

Comets, Pickups, Solar Wind, Magnetometers, Spacecraft, Atmospheres, Pickup Ions, Particle Emission, Solar Wind, Magnetometers For Magnetic Field Measurements, Spacecraft/Atmosphere Interactions

Scientific paper

Ions created from the neutral comae of active comets are picked up by the solar wind and carried downstream to form induced magnetotails. These are observed remotely as comets' ion or plasma tails. Here, we review the magnetic field structure of these tails, and summarize remote and in situ observations that have helped our understanding of them. Magnetometer measurements by spacecraft have confirmed the predicted two-lobe magnetic field structure, but this is complicated by variations in the heliospheric magnetic field, HMF, local to the comet. The tails formed at comets close to the Sun appear to be surrounded by a region of the solar wind where the HMF has draped around the magnetotail structure itself. Candidate weakened shock structures on either side of magnetotail traversals indicate that the regions affected by an active comet's presence often occupies a significant portion of the inner heliosphere.

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