Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.267..130h&link_type=abstract
Nature, vol. 267, May 12, 1977, p. 130, 131.
Astronomy and Astrophysics
Astrophysics
6
Binary Stars, O Stars, Pulsars, Stellar Models, X Ray Sources, Astrophysics, Neutron Stars, Stellar Motions, Supergiant Stars, Supernova Remnants
Scientific paper
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. Two dynamical classes of pulsars can be distinguished. The high-velocity, widely distributed sources are supposed to originate primarily from single stars. The second class of pulsars is presumed to arise in tightly bound, massive binaries where the asymmetric force is insufficient to unbind the system (nor does the supernova explosion that produces the neutron star usually unbind the system either). The force thus acts on the system as a whole and the neutron star is like a tugboat, pulling an object more massive than itself, which diminishes its velocity. This circumstance permits an explanation of the discrepancy between the characteristic and dynamical ages of pulsars after a second supernova has occurred, and might also account for the existence of certain categories of OB supergiant binaries.
Helfand David J.
Tademaru Eugene
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