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In response to ESO's call for proposals for second generation instruments forthe Very Large Telescope Interferometer (VLTI), a consortium is currentlydeveloping the VLTI-Spectro-Imager (VSI). In the context of the Phase A study,a science group has prepared a science case taking advantage of the expectedperformances of VSI. Among several science topics, the case of dust makingWolf-Rayet binaries producing the so-called pinwheel nebulae has beenconsidered. Here, we review the main specifications of VSI, and we providepreliminary results expected to illustrate the imaging capabilities of VSI, andthe interest for the study of pinwheel nebulae similar to those formed close towell-known systems such as WR98a and WR104.

Prospects for the study of dust making Wolf-Rayet binaries with the VLTI-Spectro-Imager (VSI)