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Title: Dynamics of Mars' magnetosphere

If Mars has a small intrinsic magnetic moment, Mars' magnetosphere could vary on time scales of a few minutes due to reconnection with the solar wind magnetic field. The day-side magnetopause will be one or two reflected-ion Larmor radii from the bow shock. Substorms will have scale-times of about six minutes. Mars' high ionospheric conductance will virtually stop polar cap convection, and create a magnetic topological crisis unless convecting magnetic flux finds a dissipative way to return to the day-side. The strong magnetic hear induced by magnetospheric convection above the ionosphere could be tearing unstable. The magnetic field might diffusively percolate through the tearing layer. This shearing also draws field aligned currents from the ionosphere which could inject few KeV heavy ionospheric ions into the magnetotail.
Authors:
;  [1] ;  [2] ;
  1. (Univ. of California, Los Angeles (USA))
  2. (Space Research Institute, Moscow (USSR))
Publication Date:
OSTI Identifier:
5833121
Resource Type:
Journal Article
Resource Relation:
Journal Name: Geophysical Research Letters (American Geophysical Union); (USA); Journal Volume: 16:8
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; MARS PLANET; PLANETARY MAGNETOSPHERES; DYNAMICS; CONVECTION; ELECTRIC CONDUCTIVITY; INTERACTIONS; MAGNETIC FLUX; MAGNETIC MOMENTS; MAGNETIC RECONNECTION; PLANETARY IONOSPHERES; SHEAR; SHOCK WAVES; SOLAR WIND; VARIATIONS; ATMOSPHERES; ELECTRICAL PROPERTIES; ENERGY TRANSFER; HEAT TRANSFER; MASS TRANSFER; MECHANICS; PHYSICAL PROPERTIES; PLANETARY ATMOSPHERES; PLANETS; SOLAR ACTIVITY 640107* -- Astrophysics & Cosmology-- Planetary Phenomena