Radiation pressure and the geocorona

Details Radiation pressure and the geocorona Radiation pressure and the geocorona

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phdt........22b&link_type=abstract

Ph.D. Thesis Rice Univ., Houston, TX.

Other

Geocoronal Emissions, Liouville Equations, Radiation Pressure, Solar Radiation, Density Measurement, Kinetic Theory, Temperature Profiles

Scientific paper

The theory of planetary exospheres is extended to incorporate solar radiation pressure in a rigorous manner, and an evaporative geocoronal prototype (classical, motionless exobase) is constructed using Liouville's theorem. Calculations for density and kinetic temperature at points along the Earth-Sun axis (solar and anti-solar directions) reveal an extensive satellite component, comprising approx. 2/3 of the total hydrogen density near 10 Earth radii, and a temperature profile suggestive of a near-isotropic quasi-Maxwellian kinetic distribution for the bound component. A geotail is also evident in this model as an enhancement of the local midnight density compared to local noon that increases radially outward from roughly 25% at 10 Earth radii to over 60% at 20 Earth radii. Additional mechanisms acting upon the geocorona alter this evaporative case in notable ways. Solar ionization has been include in a simple fashion; the effect is to deplete the density somewhat without otherwise altering the structure.

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