Star formation at high-z: a stacking approach applied to mm-data

Star formation is a key ingredient of the formation and evolution of galaxies. The associated dust emission has been observed up to very high-z. At mm wavelengths, this can be done thanks to the negative k-correction, which compensates the increasing luminosity distance. However, only the brightest sources can be detected with the present instruments, even with the early ALMA capabilities. Here we present a routine to perform stacking analysis on interferometric data. The stacking is performed both in the (u,v) and in the sky plain. We tested the algorithm on 2 and 3mm data taken at the Plateau de Bure Interferometer. Preliminary results of this study are presented. This analysis allow us to significantly boost the sensitivity of our observations. In this way we will finally assess the properties of typical star forming galaxies at virtually *any* redshift.