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We have investigated the relation of the direction of the momentum among thematter, neutrino, and proto-neutron star in a collapse-driven supernova inorder to discuss the pulsar kick. In particular, we have investigated theeffects of the pulsar motion on the explosion, which are neglected in theprevious study. As a result, it is suggested that the direction of the totalmomentum of the matter and neutrino is opposite to that of the momentum of theproto-neutron star in the asymmetric explosion models. This is because thecenter of the explosion deviates from the center of the progenitor due to thepulsar motion. This picture is common among the asymmetric explosion models. Soif we assume that the pulsar motion is caused by an asymmetric supernovaexplosion, the neutron star born in SN 1987A, which has not been found yet,will be moving in the southern part of the remnant. In other words, if we canfind one neutron star in SN 1987A on the south part of the remnant, asymmetricexplosion models will be supported by the observation better than the binarymodels.Comment: 10 pages and 4 postscript figure

Pulsar Kick and Asymmetric Iron Velocity Distribution in SN 1987A