Histograms of the main physical parameters of the sources in Vela-C (top left: temperature; top right: mass; bottom left: diameter; bottom right: Herschel luminosity). Starless and protostellar sources are separately highlighted in red and blue, respectively. The black line in the top left panel represents the temperature of the surrounding cloud, taken from Hill et al. (2011), while that in the bottom left panel highlights the spatial resolution limit.