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Fig. 8

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The correlation between the acceleration a(re) and the dynamical mass-luminosity ratio (M/L)dyn derived assuming Newtonian dynamics is shown for the same objects as in Fig. 7. The shaded region indicates the range in (M/L)dyn as it follows directly from MOND models (without any parameter adjustments) using Eq. (19). The graph shows the consistency of the data in a MONDian universe for an observer who interprets observations with Newtonian dynamics. Encircled dwarf spheroidals outside this range (UMa, Dra, and UMi) may indicate non-equilibrium dynamics, either because the whole system is unbound, or because of unbound interloper stars among the member stars (see Sect. 6.4.2). That virtually all pressure-supported stellar systems fall in the shaded MOND region suggests a successful consistency check. That is, stellar dynamics is MONDian rather than Newtonian on galactic scales.

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