Plasma convection in Neptune's magnetosphere | Zendy

Selesnick R. S. | Zendy

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Plasma convection in Neptune's magnetosphere

Author(s) -

Selesnick R. S.

Publication year - 1990

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl017i010p01681

Subject(s) - magnetosphere , physics , neptune , plasma , convection , planet , ionosphere , torus , cyclotron , magnetosphere of jupiter , magnetic field , particle acceleration , geophysics , computational physics , astrophysics , mechanics , nuclear physics , magnetopause , geometry , mathematics , quantum mechanics

The magnetosphere of Neptune changes its magnetic configuration continuously as the planet rotates, leading to a strong modulation of the convection electric field. Even though the corotation speed is considerably larger, the modulation causes the small convection speed to have a cumulative effect, much like the acceleration of particles in a cyclotron. A model calculation shows that plasma on one side of the planet convects out of the magnetosphere in a few planetary rotations, while on the other side it convects slowly planetward. The observation of nitrogen ions from a Triton plasma torus may provide a test of the model.

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