A unified transport equation for both cosmic rays and thermal particles

Details A unified transport equation for both cosmic rays and thermal particles A unified transport equation for both cosmic rays and thermal particles

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405l..79w&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 405, no. 2, p. L79-L81.

Astronomy and Astrophysics

Astrophysics

12

Cosmic Rays, Radiation Transport, Transport Theory, Particle Acceleration, Space Plasmas

Scientific paper

We present a unified transport equation that is valid for particles of all energies if the particle mean free paths are much smaller than macroscopic fluid length scales. If restricted to particles with random speeds much greater than fluid flow speeds, this equation reduces to the previously discussed extended cosmic-ray transport equation. It is significant that this allows one to describe the acceleration of particles from thermal energies to cosmic-ray energies using one transport equation. This is in contrast to previous transport equations (the Parker equation and the extended cosmic-ray transport equation), which were restricted to fast particles. The close connection to the extended cosmic-ray transport equation is demonstrated.

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