Acceleration Mechanisms for Cometary Ions

  1. Alan Johnstone
  1. T. Terasawa

Published Online: 26 MAR 2013

DOI: 10.1029/GM061p0277

Cometary Plasma Processes

Cometary Plasma Processes

How to Cite

Terasawa, T. (1991) Acceleration Mechanisms for Cometary Ions, in Cometary Plasma Processes (ed A. Johnstone), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM061p0277

Author Information

  1. Department of Geophysics, Kyoto University

Publication History

  1. Published Online: 26 MAR 2013
  2. Published Print: 1 JAN 1991

ISBN Information

Print ISBN: 9780875900278

Online ISBN: 9781118663660



  • Comets;
  • Space plasmas;
  • Astrophysics


In situ observation showed that efficient particle acceleration occurs in the region around comets. Emphasis has been given on the second-order Fermi acceleration process, by which cometary ions can be efficiently accelerated provided that the hydromagnetic turbulence around comets consists of waves of different phase velocities. In the light of accumulated information on the cometary environment, we shall re-evaluate several acceleration models.