Comment on 'Self-dressing and radiation reaction in classical electrodynamics'

Using the canonical formalism, Compagno and Persico [J. Phys. A: Math. Gen. 35 (2002) 3629--45] have calculated the 'radiation-reaction' force on a uniform spherical charge moving rigidly, slowly and slightly from its position at the time when the transverse electric field is assumed to vanish. This force is shown to result in the same time-averaged self-force as that which has been obtained by different means for the test charge of a Bohr--Rosenfeld field-measurement procedure and which Compagno and Persico claimed to be incorrect.Comment: REVTeX, 4 pages; this version has some cosmetic changes to agree fully with the published version. Reply to this Comment is in G. Compagno and F. Persico, J. Phys. A: Math. Gen. 35, 8965 (2002); response to the Reply is in physics/021005

Comment on "Preacceleration without radiation: The nonexistence of preradiation phenomenon," by J.A. Heras [Am. J. Phys. 74, 1025 (2006)]

It is argued that a recent claim that there is no radiation in the preacceleration part of a non-runaway solution of the Abraham--Lorentz equation is incorrect.Comment: 3 pages, no figure