چكيده فارسي :
It is shown that conserved charges associated with a specific subclass of gauge
symmetries of Maxwell electrodynamics are proportional to the well known electric
multipole moments. The symmetries are residual gauge transformations surviving af-
ter fixing the Lorenz gauge, and have nontrivial charge. These \Multipole charges
receive contributions both from the charged matter and electromagnetic fields. The
former is nothing but the electric multipole moment of the source. In a stationary
configuration, there is a novel equipartition relation between the two contributions.
The multipole charge, while conserved, can freely interpolate between the source and
the electromagnetic field, and therefore can be propagated with the radiation. Using
the multipole charge conservation, we obtain infinite number of constraints over the
radiation produced by the dynamics of charged matter.
1e-mail: ali.
