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The Origin and Motion of PSR J0538+2817 in S147
We report on Very Long Baseline Array (VLBA) astrometry and Chandraimaging of PSR J0538+2817 in the supernova remnant S147. We measure aparallax distance of 1.47+0.42-0.27 kpc along witha high-precision proper motion, giving a transverse velocityV⊥=400+114-73 km s-1. Asmall extended wind nebula is detected around the pulsar; the symmetryaxis of this structure suggests that the spin axis lies12deg+/-4deg from the velocity vector(two-dimensional), but the emission is too faint for robustmodel-independent statements. The neutron star is hot, consistent withthe young ~40 kyr kinematic age. The pulsar progenitor is likely arunaway from a nearby cluster, with NGC 1960 (M36) a leading candidate.
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