Pulsar magnetogyro ratios and pulsar evolution

Details Pulsar magnetogyro ratios and pulsar evolution Pulsar magnetogyro ratios and pulsar evolution

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...225..574w&link_type=abstract

Astrophysical Journal, Part 1, vol. 225, Oct. 15, 1978, p. 574-581.

Astronomy and Astrophysics

Astronomy

9

Gyromagnetism, Pulsars, Statistical Analysis, Stellar Evolution, Stellar Structure, Angular Velocity, Hall Effect, Magnetic Effects, Radio Sources (Astronomy), Stellar Magnetic Fields

Scientific paper

Magnetogyro ratios are calculated for 84 pulsars and plotted against their periods. Several interesting features of the resulting distribution are noted. Statistical analysis indicates that it is improbable these features are accidental. In conjunction with the pulsar density as a function of pulsar period, the implications of this distribution for scenarios of pulsar evolution are examined. The two chief conclusions that emerge are as follows: (1) Pulsars with fluid cores undergo decoupling of the core from the crust (as predicted by Greenstein) and subsequent magnetic field decay when they spin down to a period of about 0.5 s. (2) It is more likely that the primary magnetic field of pulsars is due to the Hall-field-limited battery effect than to fossil fields.

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