Distribution of the spatially resolved regions (spaxel-by-spaxel) in the log([FeII]1.64 μm/Brγ) − log(H₂2.12 μm/Brγ) plane for the sample of LIRGs. Contours encircle the areas were 25%, 50%, 75%, and 90% of the spaxels are contained. The histograms represent the distribution for the [FeII]1.64 μm/Brγ and H₂/Brγ ratios with mode (log) values of +0.16 and −0.17, respectively. The blue and green lines indicate the upper limits for the young star-forming regions and AGNs as derived from our spatially resolved two-dimensional spectroscopy on the high surface brightness compact regions of the prototype LIRGs (see Sect. 3.3 for details).