Milky Way and M31 rotation curves: $\Lambda$CDM vs. MOND
  A systematic downward trend in the weak gravity (large distances) segment of
the radial acceleration in galactic rotation curves was found in the EAGLE
simulation \cite{Dai:2017unr}, which was based on the standard $\Lambda$CDM
model. A similar feature was discovered in \cite{Chae:2020omu} and interpreted
as a MOND prediction. We analyze the existing rotation-curve data that extends
to very large distances and low accelerations for the Milky Way and M31, and
find that they are consistent with the $\Lambda$CDM EAGLE simulation, while
their deviation from the generic MOND prediction would need to be ascribed to
an external field effect, or possibly a {\it post facto} selected acceleration
function $\mu(x)$.
