MOND Fit of Nature Physics 11:245 Mass Distribution Model to Rotation Curve Data

TL;DR

This paper demonstrates that applying MOND with a specific interpolation function to a baryonic mass model accurately fits the Milky Way's rotation curve data without parameter tuning, supporting MOND's viability.

Contribution

It provides a direct comparison of a baryonic mass model with observational data using MOND, confirming previous findings and extending them to the Milky Way.

Findings

MOND with simple interpolation fits rotation data well

No parameter adjustments needed for the fit

Results align with previous external galaxy studies

Abstract

In arXiv:1505.05181, Iocco, Pato, and Bertone analyze the consistency of Modified Newtonian Dynamics (MOND) with their compiled Milky Way data and baryonic mass distribution models. We contribute to the discussion by feeding the baryonic mass distribution model shown as a black line in Figure 2 of their original paper, Nature Physics 11:245, into the MOND formula assuming the so-called simple interpolation function, and directly plotting these results on top of the compiled observational rotation curve data from their original paper. We find that the baryonic model using MOND with the simple interpolation function provides a striking fit to the rotation curve observational data with no parameter adjustments required. Our results are consistent with the findings of McGaugh (2008) as well as with studies of external galaxies.