Three proposed pulsar/supernova remnant associations and their possible origin in close binary systems

Abstract

An attempt is made to establish associations between pulsars and supernova remnants based not only on their distances, ages and position but also on pulsar radio polarization information. Of three pulsars investigated, a supernova remnant (G 193.3-1.5) is visible near one (PSR 0525 + 21) but the estimated ages of the remnant and the pulsar are discrepant. Possible ways of removing this discrepancy are discussed. Two further associations are proposed on the basis of position and distance estimates alone. They are PSR 0153 + 61 with G 132.4 + 2.2 (HB3) and PSR 1927 + 18 with G 53.9 + 0.3.