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We present a study of the kinematics and the physical properties of thecentral region of the Hickson Compact Group 31 (HCG 31), focusing on the HCG31A+C system, using integral field spectroscopy data taken with theGemini-south telescope. The main players in the merging event (galaxies A andC) are two dwarf galaxies that in the past have already had one closeencounter, given the observed tidal tails, and may now be in their secondapproach, possibly about to merge. We present new velocity fields and H{\alpha}emission, stellar continuum, velocity dispersion, electron density, H{\alpha}equivalent width and age maps. Considering the high spatial resolution of theIFU data, we were able to measure various components and estimate theirphysical parameters, spatially resolving the different structures in thisregion. Our main findings are the following: (1) we report for the first timethe presence of a super stellar cluster next to the burst associated to the HCG31C central blob, related to the high values of velocity dispersion observed inthis region as well as to the highest value of stellar continuum emission. Thismay suggest that this system is cleaning its environment through strong stellarwinds that may then trigger a strong star formation event in its neighborhood,(2) among other physical parameters, we estimate an L(H{\alpha})~14x10^{41}erg/s and a SFR~11 Msol/yr for the central merging region of HCG 31 A+C. Thesevalues indicate a high star formation density, suggesting that the system ispart of a merging object, supporting previous scenarios proposed for thissystem.

Probing the nature of the pre-merging system Hickson Compact Group 31 through IFU data