Pulsar evolution

Astronomy and Astrophysics – Astronomy

Scientific paper

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Pulsars, Stellar Evolution, Stellar Luminosity, Stellar Rotation, Axes Of Rotation, Magnetic Dipoles

Scientific paper

Most pulsars lose rotation energy by emitting magnetic dipole radiation, with the field component normal to the neutron star spin axis weakening on a time scale of order 10 Myr. Pulsar evolutionary tracks in the (spin period, spindown) plane are discussed. The evolution span is 5-10 Myr for most observed pulsars, ranging from 10-100 Myr. A pulsar will turn off and its evolution will end not simply because the pulses carry a weaker radio flux but because pulse nulling has lowered the luminosity.

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