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Spectropolarimetry of planets: what observational data can be essential for correct microphysical retrievals of atmospheric aerosols

DOI: 10.1615/ICHMT.2007.ConfElectromagLigScat.100
pages 29-32

Janna M. Dlugach
Main Astronomical Observatory of the National Academy of Sciences of Ukraine, 27 Zabolotny Str., 03680, Kyiv, Ukraine

Michael I. Mishchenko
NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, U.S.A.

Résumé

We present the results of computations of the degree of linear polarization for the center of a planetary disk in the phase angle range 0° < α < 90°. The computations were performed for various models of the cloud layer of Jupiter derived in [1-3] on the basis of spectropolarimetric observations of Jupiter [4]. For α ≥ 15°, our results show a noticeable difference in the value of polarization depending on the adopted cloud-particle model. We conclude that the availability of observational data in a wide range of phase angles can provide critical constraints on the particle shape.

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