Hydrogen on Venus - Exospheric distribution and escape

Details Hydrogen on Venus - Exospheric distribution and escape Hydrogen on Venus - Exospheric distribution and escape

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32.1235r&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 32, Oct. 1984, p. 1235-1255.

Computer Science

33

Atmospheric Chemistry, Atmospheric Composition, Exosphere, Hydrogen, Venus Atmosphere, Atmospheric Models, Atmospheric Temperature, Atomic Collisions, Gas Density, Planetary Ionospheres

Scientific paper

The spatial distribution of suprathermal H in the Venus atmosphere is calculated using an approximate numerical solution of the time-independent Boltzmann equation. Sources of suprathermal H are specified on the basis of Pioneer Venus measurements. Reactions involving H2 are neglected. The computed densities of suprathermal H are in satisfactory agreement with profiles derived from analysis of Lyman-alpha airglow by Mariners 5 and 10 and Veneras 11 and 12. The dayside emission at radial distances larger than 18,000 km is attributed to scattering of solar photons by fast H atoms produced primarily on the nightside near midnight. The nightside ionosphere, and consequently the source of suprathermal H, are both expected to vary in response to changes in the solar wind.

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