SIMBAD references

RV Tauri stars are a heterogeneous subclass of the Population II Cepheids, probably in the post-AGB stage of evolution. Many RV Tauri stars show some degree of depletion in their photospheres, which is caused by a gas-dust separation in the circumstellar environment and a subsequent gas accretion, making the photosphere devoid of refractory elements. The most favorable circumstance for this process to occur is when the circumstellar dust is trapped in a disk. The presence of a disk in evolved objects is likely related to binarity. In this contribution, we present the results of our abundance study of the first depleted RV Tauri star in the Large Magellanic Cloud, MACHO82.8405.15, based on high-resolution VLT-UVES spectra. While our analysis of other LMC RV Tauri stars is still in progress, it is clear that, also in the LMC, depletion seems to be quite common amongst RV Tauri objects.