Computer Science
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33..499m&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 33, May 1985, p. 499-505. NASA-supported research.
Computer Science
4
Atmospheric Composition, Auroral Zones, Exosphere, Hydrogen Atoms, Plasma Heating, Atmospheric Temperature, Gas Density, Ion Accelerators, Neutral Gases, Spatial Distribution
Scientific paper
The effect of diurnal and magnetospheric modulations on the structure of the hydrogen geocorona is analyzed on the basis of recent observations. Particular attention is given to the enhancement of neutral escape by plasma effects, including the recently observed phenomenon of low-altitude ion acceleration. It is found that, while significant fluxes of neutral H should be produced by transverse ion acceleration in the auroral zone, the process is probably insufficient to account for the observed polar depletion of hydrogen atoms. Analysis of recent exospheric temperature measurements from the Dynamics Explorer-2 satellite suggest that neutral heating in and near the high latitude cusp may be the major contributor to depleted atomic hydrogen densities at high latitudes. Altitude profiles of the production rates for escaping neutral hydrogen atoms during periods of maximum, minimum, and typical solar activity are provided.
Biddle A. P.
Killeen Tim L.
Moore Thomas Earle
Waite H. Jr. J..
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