Magnetic Fields and the P-dot-P Diagram for Radio Pulsars

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Various mechanisms for the loss of angular momentum of neutron stars are analyzed. Theoretical predictions about the evolution of the period are compared with the observed distribution of pulsars on the log log(P) diagram. Pulsars with short periods (P≤0.1 s) cannot be fit well by any of the models considered. Their braking index is n=-1, which requires the development of a new braking mechanism. The evolution of pulsars with P>1.25 s is described by the law , probably due to processes internal to the neutron stars. The observational data for pulsars with 0.1$tau = P/2dot P$
; cannot serve as measures of their real ages.

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