Gravitoelectromagnetism

Is MOND an an effect of cosmic frame-dragging à la Mach?

The origin and physical mechanism of Modified Newtonian Dynamics (MOND) is unknown. We derive the acceleration scale constant a0 and MOND’s interpolating function from a linear approximation to General Relativity which implements Mach’s principle and the relativity of acceleration, in a modified inertia model. This proof of concept motivates the possibility that MOND arises from large-scale linear inertial frame-dragging induced by the expanding universe within General Relativity.

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How General Relativity fails to explain Galaxy Dynamics

Newtonian gravity cannot explain galaxy dynamics and their rotation curves. But can General Relavity explain them? We explore the linear approximation of General Relativity (gravitomagnetism) and apply it the orbits of stars in galaxies. The question of whether boundary conditions can play a role in explaining the dark matter effects in galaxies is also addressed.

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