The effect of binaries on the space velocity distribution of single pulsars

Details The effect of binaries on the space velocity distribution of single pulsars The effect of binaries on the space velocity distribution of single pulsars

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999newa....4..167d&link_type=abstract

New Astronomy, vol. 4, no. 3, p. 167-172.

Astronomy and Astrophysics

Astronomy

5

Binaries: Close, Supernovae, Stars: Kinematics, Stars: Neutron, Pulsars: General

Scientific paper

In this paper we determine the theoretically expected space velocity distribution of single pulsars resulting from real single stars and from disrupted binaries. Hereto we use a population number synthesis (PNS) code that contains a detailed model for single and binary evolution. The binary period evolution and the effect of an asymmetric supernova on the binary parameters are followed in detail. If the progenitor of the pulsar was in a binary, disrupted by an asymmetric supernova explosion, the influence of the orbital velocity of the progenitor and of the binary potential is incorporated. We conclude that: (i) the shape of the pulsar space velocity distribution is mainly determined by the input kick distribution; (ii) the importance of binary evolution depends on the relative fraction of small and large kick velocities.

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