There's a paper from a few months ago that claims to have measured this unique Modified Newtonian Dynamics (MOND) effect at high significance. The result seems very interesting:
- The effect is unique to MOND and not easily replicated by Lambda-CDM.
- The effect was measured in 100+ galaxies. In galaxies which were in strong external gravitational fields, the EFE was detected; in those that weren't, it was not detected.
- The analysis was conducted blind, so experimenter bias is not an issue.
- The authors analyzed possible systematics and didn't find anything.
Clearly if this result is robust then it would be very groundbreaking. How robust is this measurement? It's been a few months and the paper seems to have gotten only a few citations which don't directly address the measurement, leaving it unclear to me how the community is reacting to the paper.