  We investigate the connection between the classical Larmor formula and the
quantum Unruh effect by computing the emitted power by a uniformly accelerated
charged particle and its angular distribution in the coaccelerated frame. We
consider a classical particle accelerated with nonzero charge only for a finite
period and then take the infinite-time limit after removing the effects due to
the initial charging and final discharging processes. We show that the result
found for the interaction rates agrees with previous studies in which the
period of acceleration with nonzero charge was taken to be infinite from the
beginning. We also show that the power and angular distribution of emission,
which is attributed either to the emission or absorption of a Rindler photon in
the coaccelerated frame, is given by the Larmor formula, confirming that, at
tree level, it is necessary to take into account the Unruh effect in order to
reproduce the classical Larmor radiation formula in the coaccelerated frame.
