title: Tugboat model for OB binaries, X-ray stars and pulsars.
abstract: An examination of the kinematical properties of binary OB stars, binary X-ray sources and pulsars suggests an evolutionary sequence linking an apparent low-velocity class of pulsars to the binary nature of their extreme Population I progenitors.
authors.affiliation: Department of Physics and Astronomy, University of Massachusetts, Amherst, MA 01003, USA.
authors.forename: D J
authors.initials: DJ
authors.lastname: Helfand
authors.forename: E
authors.initials: E
authors.lastname: Tademaru