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We present the ALMA view of 11 main-sequence DSFGs, (sub-)millimeter selectedin the GOODS-S field, and spectroscopically confirmed to be at the peak ofCosmic SFH (z = 2-3). Our study combines the analysis of galaxy SED with ALMAcontinuum and CO spectral emission, by using ALMA Science Archive products atthe highest spatial resolution currently available for our sample (< 1 arcsec).We include galaxy multi-band images and photometry (in the optical, radio andX-rays) to investigate the interlink between dusty, gaseous and stellarcomponents and the eventual presence of AGN. We use multi-band sizes andmorphologies to gain an insight on the processes that lead galaxy evolution,e.g. gas condensation, star formation, AGN feedback. The 11 DSFGs are verycompact in the (sub-)millimeter (median r(ALMA) = 1.15 kpc), while the opticalemission extends tolarger radii (median r(H)/r(ALMA) = 2.05). CO lines revealthe presence of a rotating disc of molecular gas, but we can not exclude eitherthe presence of interactions and/or molecular outflows. Images at higher(spectral and spatial) resolution are needed to disentangle from the possiblescenarios. Most of the galaxies are caught in the compaction phase, when gascools and falls into galaxy centre, fuelling the dusty burst of star formationand the growing nucleus. We expect these DSFGs to be the high-zstar-formingcounterparts of massive quiescent galaxies. Some features of CO emission inthree galaxies are suggestive of forthcoming/ongoing AGN feedback, that isthought to trigger the morphological transition from star-forming disks toETGs.

An ALMA view of 11 Dusty Star Forming Galaxies at the peak of Cosmic Star Formation History