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We present the results of deep high resolution imaging performed withACS/HRC@HST in the most active region of the nearby starburst galaxy NGC 4214.We resolved the stellar populations of five Young Massive Clusters and theirsurrounding galactic field. The star formation history of this region ischaracterized by two main bursts occurred within the last 500 Myr, with theoldest episode spread out across an area larger than that covered by the mostrecent one. The ages derived for the analysed clusters cover a wide rangebetween 6.4<log(t/yr)<8.1 in agreement with those predicted by recent analysesbased on integrated photometry. The comparison between the mass of the youngassociations and that of the surrounding field population with similar agesindicates a high cluster formation efficiency (Gamma~33%) which decreases whenold populations are considered. The mass function of the major assembly hasbeen found to be slightly flatter than the Salpeter (1955) law with a hint ofmass segregation. We found no clear signatures of multiple stellar populationsin the two young (log(t/yr)<6.8) associations where we were able to resolvetheir innermost region. The masses and sizes of three clusters indicate that atleast one of them could evolve toward a globular cluster-like structure.

Resolved photometry of Young Massive Clusters in the starburst galaxy NGC 4214