Aspects of pulsar evolution

Details Aspects of pulsar evolution Aspects of pulsar evolution

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...236..245f&link_type=abstract

Astrophysical Journal, Part 1, vol. 236, Feb. 15, 1980, p. 245-254.

Statistics

17

Pulsars, Statistical Analysis, Stellar Evolution, Stellar Rotation, Decay Rates, Neutron Stars, Stellar Models, Torque

Scientific paper

Pulsar statistics are examined from the point of view of generalized evolutionary equations that assume that pulsar torques diminish exponentially with a decay-time constant T, to be determined empirically. Decay or alignment of the neutron-star magnetic moment, or a combination, may cause the torque to diminish with time. The Sturrock-Ruderman-Sutherland pair-production model provides a quantitative way to calculate pulsar lifetimes. Different tests, which use the data in partially independent ways and involve different assumptions, consistently suggest that T is less than a million years and may be as short as several hundred thousand years. The distribution of pulsars, and of those with more than 5% missing pulses is quantitatively consistent with pair production threshold, when the variation of this threshold with neutron star mass is taken into account.

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