Figure 28

Figure 28: A comparison of the mass-to-light ratios obtained from MOND rotation curve fits (points) with the independent expectations of stellar population synthesis models (lines) [42]. The mass-to-light ratio in the optical (blue B-band, left) and near-infrared (2.2 μm K-band, right) are shown as a function of B − V color (the ratio of blue to green light). The one free parameter of MOND rotation curve fits reproduces the normalization, slope, and scatter expected from what we know about stars. Not all galaxies illustrated here have both B and K-band data. Some have neither, instead having photometry in some other bandpass (e.g., V or R or I).