12:00 Observatory LAb
Abstract:
Using Sciama’s law of
inertial induction and the fact that gravitational interactions are
subject to retardation, we compute the effective force on an
accelerating particle due to the contributions by the entire universe.
Because the accelerating particle fields contain a term proportional to
1/r, in addition to the more conventional 1/r^2 of the static field, the
contribution of gravitational interactions by the rest of the universe
onto an accelerating mass m (interior to the spherical distribution of
cosmic matter) does not vanish. The resulting gravitational force has
the form F = −kma, where k ~ 1, thereby indicating that inertial forces
are due to gravitational interactions with the distant objects, as
posited by Mach's principle. We will discuss whether these
considerations support the presence of a characteristic universal
acceleration of order c H_0 (the speed of light divided by the age of
the Universe) that can account for the galactic rotation curves and the
apparent acceleration of the Universe in violation of the strong
equivalence principle.
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