In one minute

M. E. McCulloch addresses an unexplained cutoff: no disc galaxies are observed with masses below about 10^9 solar masses. His model assumes inertia comes from Unruh radiation and that this radiation is limited by a Casimir effect on the scale of the Hubble horizon. As acceleration falls, inertial mass falls even faster, holding acceleration at a minimum close to the observed cosmic acceleration. For disc galaxies it predicts a minimum apparent mass of 1.1 × 10^9 solar masses, close to observation, and it also predicts the Hubble mass. The inertia assumption could be tested by accelerating particles until the Unruh radiation they see can be supplemented with man-made radiation, making a change in inertia detectable.

Minimum accelerations from quantised inertia