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Our objective is to study the vertical dust distribution in the circumbinaryring of the binary system GG Tau and to search for evidence of stratification,one of the first steps expected to occur during planet formation.  We present a simultaneous analysis of four scattered light images spanning arange of wavelength from 800 nm to 3800 nm and compare them with (i) aparametric prescription for the vertical dust stratification, and (ii) with theresults of SPH bi-fluid hydrodynamic calculations.  The parametric prescription and hydrodynamical calculations of stratificationboth reproduce the observed brightness profiles well. These models also providea correct match for the observed star/ring integrated flux ratio. Anothersolution with a well-mixed, but ``exotic'', dust size distribution also matchesthe brightness profile ratios but fails to match the star/ring flux ratio.These results give support to the presence of vertical stratification of thedust in the ring of GG Tau and further predict the presence of a radialstratification also.

On the stratified dust distribution of the GG Tau circumbinary ring