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Post-starburst galaxies are believed to be in a rapid transition betweenmajor merger starbursts and quiescent ellipticals, where AGN feedback issuggested as one of the processes responsible for the quenching. To study therole of AGN feedback, we constructed a sample of post-starburst candidates withAGN and indications of ionized outflows. We use MUSE/VLT observations toresolve the properties of the stars and multi-phased gas in five of them. Allthe galaxies show signatures of interaction/merger in their stellar or gasproperties, with some galaxies at an early stage of interaction with companionsat distances $\sim$50 kpc, suggesting that optical post-starburst signaturesmay be present well before the final starburst and coalescence. We detectnarrow and broad kinematic components in multiple transitions in all thegalaxies. Our detailed analysis of their kinematics and morphology suggeststhat, contrary to our expectation, the properties of the broad kinematiccomponents are inconsistent with AGN-driven winds in 3 out of 5 galaxies. Thetwo exceptions are also the only galaxies in which spatially-resolved NaIDP-Cygni profiles are detected. In some cases, the observations are moreconsistent with interaction-induced galactic-scale flows, an often overlookedprocess. These observations raise the question of how to interpret broadkinematic components in interacting and perhaps also in active galaxies, inparticular when spatially-resolved observations are not available or cannotrule out merger-induced galactic-scale motions. We suggest that NaID P-Cygniprofiles are more effective outflow tracers, and use them to estimate theenergy that is carried by the outflow.

Not so windy after all: MUSE disentangles AGN-driven winds from merger-induced flows in rapidly-transitioning galaxies