Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...102..359f&link_type=abstract
Astronomy and Astrophysics, vol. 102, no. 3, Oct. 1981, p. 359-370.
Astronomy and Astrophysics
Astrophysics
43
Interplanetary Dust, Plasma Interactions, Solar Wind, Zodiacal Dust, Distribution Functions, Neutral Gases, Neutral Particles, Particle Production, Resonance, Spatial Distribution, Surface Reactions
Scientific paper
A solution for the local velocity distribution function of zodiacal dust particles based on a given function of their density distribution is derived under the assumption of circular dust particle orbits without net losses along these orbits. The processes of importance for the interception of solar wind plasma by dust grain surfaces are then discussed. Specific values for the dust surface desorption efficiencies of various neutral constituents are obtained, making possible a determination of neutral particle production rates. These rates, together with the counteracting loss rates, permit a calculation of equilibrium densities of hydrogen and helium atoms. A predominance of dust-generated neutral densities over the corresponding interstellar value is found in regions inside about 0.5 AU(H) and 0.05 AU(He).
Fahr Hans Jörg
Lay Gary
Ripken H. W.
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