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Context: NGC 7538 IRS 1-3 is a high-mass star-forming cluster with severaldetected dust cores, infrared sources, (ultra)compact H$_{\rm II}$ regions,molecular outflows, and masers. In such a complex environment, importantinteractions and feedback among the embedded objects are expected to play amajor role in the evolution of the region. Aims: We study the dust, kinematic,and polarimetric properties of the NGC 7538 IRS 1-3 region to investigate therole of the different forces interplaying in the formation and evolution ofhigh-mass star-forming clusters. Methods: We perform SMA high angularresolution observations at 880 $\mu$m with the compact configuration. Wedevelop the RATPACKS code to generate synthetic velocity cubes from models ofchoice to be compared to the observational data. We develop the "mass balance"analysis to quantify the stability against gravitational collapse accountingfor all the energetics at core scales. Results: We detect 14 dust cores from3.5 $M_{\odot}$ to 37 $M_{\odot}$ arranged in two larger scale structures: acentral bar and a filamentary spiral arm. The spiral arm presents large scalevelocity gradients in H$^{13}$CO$^+$ 4-3 and C$^{17}$O 3-2, and magnetic fieldsegments well aligned to the dust main axis. The velocity gradient is wellreproduced by a spiral arm expanding at 9 km s$^{-1}$ with respect to thecentral core MM1, which is known to power a large precessing outflow. Theenergy of the outflow is comparable with the spiral arm kinetic energy, whichis dominant over gravitational and magnetic energies. In addition, thedynamical ages of the outflow and spiral arm are comparable. ... (Full abstractin the pdf version)

Shaping a high-mass star-forming cluster through stellar feedback. The case of the NGC 7538 IRS 1-3 complex