Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983avest..17...49p&link_type=abstract
(Astronomicheskii Vestnik, vol. 17, Jan.-Mar. 1983, p. 49-55) Solar System Research (ISSN 0038-0946), vol. 17, no. 1, July 1983,
Astronomy and Astrophysics
Astronomy
Gaseous Diffusion, Hydrogen Atoms, Neutral Gases, Temperature Effects, Thermosphere, Atmospheric Diffusion, Boltzmann Transport Equation, Earth Atmosphere, Thermal Diffusion, Turbulent Diffusion, Upper Atmosphere
Scientific paper
The thermal escape rate has been calculated for neutral hydrogen atoms from the present atmosphere of the earth. Here: (1) Jacchia-77, one of the most up-to-date models of the upper atmosphere, is used; (2) the process of escape from a sizable layer of dissipation (h = 100-1000 km) is examined; and (3) on the basis of the statistical Boltzmann equation, deviation from a Maxwell distribution function has been taken into account for a gas found in an escape regime. The calculations that have been carried out showed that at T(infinity) = 1000 K the disappearing flux of hydrogen atoms amounts to 3.4 x 10 to the 8th atoms/sq cm sec and is found to be in good agreement with data on the rates of the appearance of atomic hydrogen in the earth's atmosphere.
Golovchanskaia I. V.
Pudovkin Mikhail I.
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