Stellar mass of the sample galaxies as a function of the Hubble type. In addition, histograms of the Hubble type (top) and stellar mass (right) distributions are shown. Galaxies with infrared data and galaxies with optical data in at least one waveband are shown separately in all panels. The grey line in the main panel shows the median mass in each Hubble type bin, and defines the division to “high” and “low” mass galaxies used in Sect. 3.1.