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Parameters of the positive polarization maximum of the Moon: mapping
The distributions of the positive polarization degree maximum P sub(max) and, for the first time, of its phase angle a sub(max) were mapped (for wavelengths g sub(eff) = 461 nm and 669 nm) on the basis of polarimetric CCD observations of the eastern hemisphere of the Moon. The distributions of the s...
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Published in: | Solar system research 2005-01, Vol.39 (1), p.45-53 |
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Main Authors: | , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | The distributions of the positive polarization degree maximum P sub(max) and, for the first time, of its phase angle a sub(max) were mapped (for wavelengths g sub(eff) = 461 nm and 669 nm) on the basis of polarimetric CCD observations of the eastern hemisphere of the Moon. The distributions of the spectropolarimetric index for the positive polarization degree maximum CP sub(max)=P sub(max)(669 nm)/P sub(max)(461 nm) and of the 'color' of the maximum polarization angle Ca sub(max)=a sub(max) (669 nm)/ a sub(max) (461 nm) were mapped as well. It has been found that (i) the dependences of a sub(max) on the logarithm of albedo and on the logarithm of P sub(max)are linearly correlated to a large degree; (ii) the parameters a sub(max) and P sub(max)depend on wavelength only due to albedo variations; (iii) there are two branches in the 'spectropolarimetric index CP sub(max)-albedo' correlation diagram: mare regions show anti-correlation, and highlands, correlation. The maps obtained in this study can be useful both for developing remote sensing methods for the Moon and other atmosphereless bodies and for testing models of positive polarization of the light reflected by regolith-like surfaces. |
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ISSN: | 0038-0946 1608-3423 |
DOI: | 10.1007/s11208-005-0004-7 |