GOODS-ALMA: AGNs and the slow downfall of massive star-forming galaxies at z > 2

We present the results of a 69 arcmin² ALMA survey at 1.1 mm, GOODS-ALMA, matching the deepest HST-WFC3 H-band observed region of the GOODS-South field. The 35 galaxies detected by ALMA are among the most massive galaxies at z = 2-4 and are either starburst or located in the upper part of the galaxy star-forming main sequence. The analysis of the gas fraction, depletion time, X-ray luminosity and the size suggests that they are building compact bulges and are the ideal progenitors of compact passive galaxies at z∼2, and a slow downfall scenario is favoured in their future transition from star-forming to passive galaxies.