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Polarization Measurements Of Mars And Mercury: Rayleigh Scattering In The Martian Atmosphere

Ingersoll, Andrew P. (1971) Polarization Measurements Of Mars And Mercury: Rayleigh Scattering In The Martian Atmosphere. Astrophysical Journal, 163 . pp. 121-129. ISSN 0004-637X. doi:10.1086/150750.

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Ground-based polarimetric data taken near maximum elongation are presented. These data are analyzed on the assumption of an optically thin, Rayleigh-scattering atmosphere, and a surface whose polarization varies inversely as surface albedo. For Mars, the best fit to the data yields an estimate of surface pressure in the range 4-7.5 mb, if CO_2 is the principal constituent. There is no need to postulate the existence of fine dust in the Martian atmosphere. For Mercury, the best fit to the data yields an upper limit on Rayleigh scattering equal to 0.001 of the Earth's atmosphere.

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Ingersoll, Andrew P.0000-0002-2035-9198
Additional Information:© 1971 American Astronomical Society. Received 1970 March 11; revised 1970 June 24. I should like to thank Sol L. Giles for building the equipment used in this study and James A. Westphal for instruction in various aspects of observational astronomy. This research was supported by the National Aeronautics and Space Administration under grant NGL-05-002-003.
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Caltech Division of Geological SciencesNo. 1738
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ID Code:38735
Deposited On:31 May 2013 21:41
Last Modified:09 Nov 2021 23:39

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