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Exospheric temperature of Venus from Mariner 5

Published online by Cambridge University Press:  14 August 2015

Charles A. Barth
Charles A. Barth*
Affiliation:
Dept. of Astro-Geophysics and Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Colo., U.S.A.

Abstract

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The Lyman alpha measurements made on the sunlit side of Venus by Mariner 5 showed that the distribution of the radiating hydrogen atoms was governed by two scale heights. A revised model is presented in which the inner or cold distribution is attributed to hydrogen atoms in thermal equilibrium with the thermosphere and the outer or hot distribution is due to hydrogen atoms produced by the photodissociation of molecular hydrogen. The consequence of this interpretation is that the temperature of the dayside thermosphere of Venus is 325 K.

Type
Part I: Venus
Information
Symposium - International Astronomical Union , Volume 40: Planetary Atmospheres , 1971 , pp. 17 - 22
Copyright
Copyright © Reidel 1971 

References

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