Transport theoretic solutions for the beam-spreading effect in the proton-hydrogen aurora

Details Transport theoretic solutions for the beam-spreading effect in the proton-hydrogen aurora Transport theoretic solutions for the beam-spreading effect in the proton-hydrogen aurora

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1415j&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 11, p. 1415-1418

Physics

5

Ionosphere: Auroral Ionosphere, Ionosphere: Particle Precipitation, Magnetospheric Physics: Auroral Phenomena, Magnetospheric Physics: Energetic Particles, Precipitating

Scientific paper

In this paper, we give matched asymptotic solutions for the particle fluxes in the Earth's proton-hydrogen aurora. The proton (ΦP) and hydrogen atom (ΦH) fluxes are functions of two spatial and three velocity variables. These results are new and are given in closed form to the lowest order in the expansion parameter, which is the ratio of the proton gyroradius to the atmospheric scale height, and show a pronounced lateral, beamspreading effect. Numerical calculations for ΦP and ΦH where no approximations are made are also given and found to agree reasonably well with the matched asymptotic solutions.

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