image source credits:David Butler
This anomalous speed rotation distribution of galaxies is today mainly contributed to Dark Matter.
However, since a definitive experimental measurement and verification by experimental tests of the predicted values of frame dragging by the Kerr metric does not exist yet, especially for galaxies, how can Dark Matter specialists be sure that this is not a candidate for explaining the anomalous rotation of galaxies instead of the Dark Matter or MOND explanation?
This is IMO today, even more possible since there could be more gravitoelectromagnetic contributions of a polarized quantum vacuum at a galactic scale than we initially assumed as suggested in this paper here by Dragan Slavkov Hajdukovic.
In the presence of the existing controversial experimental verification of the theoretical predicted values of the frame dragging mechanism for galactic size astronomical objects are there any other contributions that could intensify beyond its predicted values the frame dragging effect that are presently not accounted for?