The Model of the Velocity Shear Instabilities at Venusian Ionopause and the Problem of Magnetic Flux Ropes Formation

  1. C. T. Russell,
  2. E. R. Priest and
  3. L. C. Lee
  1. E. V. Belova and
  2. L. M. Zelenyi

Published Online: 21 MAR 2013

DOI: 10.1029/GM058p0433

Physics of Magnetic Flux Ropes

Physics of Magnetic Flux Ropes

How to Cite

Belova, E. V. and Zelenyi, L. M. (1990) The Model of the Velocity Shear Instabilities at Venusian Ionopause and the Problem of Magnetic Flux Ropes Formation, in Physics of Magnetic Flux Ropes (eds C. T. Russell, E. R. Priest and L. C. Lee), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM058p0433

Author Information

  1. Space Research Institute, Academy of Sciences, USSR, Moscow 117810

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1990

ISBN Information

Print ISBN: 9780875900261

Online ISBN: 9781118663868

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Keywords:

  • Solar photosphere;
  • Magnetic flux;
  • Astrophysics

Summary

Shear velocity instability in the Venusian ionopause is studied as a possible mechanism of the formation of magnetic flux ropes. All characteristic spatial scales related to processes in ionopause, such as its thickness, ion Larmor radius and magnetic flux ropes diameters are of comparable values. It complicates analysis of the instability. In addition the charge exchange and photoionization effects, density and magnetic field gradients may also be important. Here we try to study the linear theory of instability taking into account all this effects. We find that for the realistic ionopause conditions the growth of small scale velocity shear driven instability can give the mechanism of formation of magnetic flux ropes with typical scales d ∼ 10–20 km.