Astrophysics and Space Science

, Volume 178, Issue 2, pp 287–298 | Cite as

Heating of astrophysical plasma by mildly-relativistic non-thermal protons

  • B. N. Dwivedi
  • A. L. Mackinnon


We study the energy deposited collisionally by mildly-relativistic, non-thermal protons as they travel away from a spatially localised acceleration region. In particular, we generalise previous results for energy deposition by monodirectional protons in a medium of homogeneous magnetic field, to the case where the protons have a range of pitch angles and traverse a region of spatially varying magnetic field (field strength variation length scale ≫ gyroradius). The possibility of multiple traversals of protons in a region contained between two regions of field strengthening is also considered. By way of illustration, the results are applied to proton energy deposition in the solar atmosphere.


Atmosphere Magnetic Field Field Strength Variation Length Pitch Angle 
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Copyright information

© Kluwer Academic Publishers 1991

Authors and Affiliations

  • B. N. Dwivedi
    • 1
  • A. L. Mackinnon
    • 1
  1. 1.Dept. of Physics and AstronomyThe UniversityGlasgowUK

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