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[abridged] The polar disk galaxy NGC4650A was observed during thecommissioning of the MUSE at the ESO VLT to obtain the first 2D map of thevelocity and velocity dispersion for both stars and gas. The new MUSE dataallow the analysis of the structure and kinematics towards the central regionsof NGC4650A, where the two components co-exist. These regions were unexploredby the previous long-slit literature data available for this galaxy. Theextended view of NGC~4650A given by the MUSE data is a galaxy made of twoperpendicular disks that remain distinct and drive the kinematics right intothe very centre of this object. In order to match this observed structure forNGC4650A, we constructed a multicomponent mass model made by the combinedprojection of two disks. By comparing the observations with the 2D kinematicsderived from the model, we found that the modelled mass distribution in thesetwo disks can, on average, account for the complex kinematics revealed by theMUSE data, also in the central regions of the galaxy where the two componentscoexist. This result is a strong constraint on the dynamics and formationhistory of this galaxy; it further supports the idea that polar disk galaxieslike NGC~4650A were formed through the accretion of material that has differentangular momentum.

Mapping the inner regions of the polar disk galaxy NGC4650A with MUSE