WISE color-color diagnostic plot for the final sample of 69 candidate restarted galaxies presented in Sect. 3.5, in Vega magnitudes. We follow the population division adopted by Mingo et al. (2016) to identify the host galaxies to be elliptical galaxies (bottom-left), star-forming galaxies (bottom-center), starburst or ultra-luminous infrared galaxies (ULIRG, bottom-right and top-right), and AGNs-dominated (top-center and top-right). The host galaxy populations are divided by the lines, with the x-axis and y-axis as proxies of the prevalence of star formation and relative AGNs dominance respectively. W3 upper limits are represented with circles with gray arrows.