Are ‘Partial Cones’ Aberrated Cones?

Abstract

‘Partial cones’ are classified as pulsars where the steepest gradient (SG) of the polarization‐position angle (PPA) traverse lies towards one edge of the pulse profile. Here we present single pulse polarimetric observations of various ‘partial cones’ observed with the Giant Meterwave Radio Telescope (GMRT) and the Arecibo Observatory(AO). We find several interesting emission properties for this class of pulsars: (a) in some cases we find sudden flarings where the dimmer part of the pulse profile becomes brighter; (b) We see evidence for drifting, signifying that the emission from this pulsar is possibly centered around the magnetic axis; and (c) the SG of the PPA tends to be towards the trailing edge of the profile. We conclude that the emission properties of partial cones are consistent with the relativistic beaming model of BCW, where the lagging PA traverse with respect to the total intensity profile is a natural prediction of the model.