Estimating the Evolution of Sparks in the Partially Screened Gap of Pulsars from Subpulse Drifting

Abstract A novel scheme has been developed to show that the observed phase behavior associated with subpulse drifting from two pulsars, J1034−3224 and J1720−2933, can be used obtain magnetic field configuration in partially screened gap (PSG). The outflowing plasma along open line region of pulsars is generated as a result spark discharges an inner acceleration (IAR) above polar cap. IAR modeled PSG steady supply positively charged ions emitted heated cap surface dominated by strong non-dipolar fields. In sparks are tightly packed constrained present boundary. lag behind rotation star during their lifetimes. As result, sparking pattern evolves different directions clockwise counterclockwise manner around stationary central phenomenon drifting. PSR four prominent components exhibits bi-drifting where alternate opposite sense drifting, while J1720−2933 single component profile shows systematically coherent drift bands. We differences directly linked natures configurations.