Hemispheric asymmetry of the magnetic field wrapping pattern in the Venusian magnetotail

Details Hemispheric asymmetry of the magnetic field wrapping pattern in the Venusian magnetotail Hemispheric asymmetry of the magnetic field wrapping pattern in the Venusian magnetotail

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3714202z&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 14, CiteID L14202

Other

6

Planetary Sciences: Solar System Objects: Venus, Planetary Sciences: Comets And Small Bodies: Interactions With Solar Wind Plasma And Fields, Planetary Sciences: Fluid Planets: Magnetospheres (2756), Planetary Sciences: Fluid Planets: Interactions With Particles And Fields

Scientific paper

We examine statistically the magnetic field in the Venusian magnetotail which is formed by the draping of interplanetary magnetic field lines. Although the near-planet and distant magnetotail regions have been sampled by the various missions to Venus and the general magnetic features of the distant magnetotail are well established, the near wake region from about 1.3 to 3 Venusian radii downstream of the planet remained unexplored until the Venus Express mission. Here we report the unanticipated finding of a draped field reversal in one hemisphere of the near Venus tail. When ordered by the interplanetary electric field orientation, the magnetic field lines in the hemisphere with inward motional electric field apparently are wrapped more tightly around Venus than in the other hemisphere, thus forming a field reversal region in the this portion of the near tail. A global hybrid simulation produces what we see and provides a three-dimensional view of the observed hemispherical asymmetry.

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