Computer Science – Numerical Analysis
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982acaps...2...35q&link_type=abstract
(Acta Astrophysica Sinica, vol. 2, no. 1, 1982, p. 35-43.) Chinese Astronomy and Astrophysics, vol. 6, Mar. 1982, p. 79-83. Tra
Computer Science
Numerical Analysis
Angular Velocity, Astrophysics, Electromagnetic Radiation, Pulsars, Stellar Evolution, Stellar Models, Stellar Rotation, Braking, Numerical Analysis, Stellar Luminosity, Torque
Scientific paper
It is usually assumed that the dipole radiation at the spin frequency Wd is the only source of braking torque on pulsars (the POG hypothesis), but certain observations cast doubt on this. The present paper discusses the effect of electromagnetic braking near the light cylinder Wem without using the POG hypothesis. Wem was found to vary as P to the -3.2 power (where P is the pulsar period), and the total power Lt was also found to vary as P to the -3.2 power (if Lt varies as Wem). A correlation analysis between Lt and P to the n power for a sample of 15 pulsars gives n = 3.1, in agreement with theoretical expectations. The analysis based on observations shows that Wem is important or even dominant in some cases. In these cases, the evolutionary path is very different from that given in Lyne et al. (1975), where Wd is assumed to be dominant. The actual braking mechanism could be a superposition of the two.
Qiao Guo Jun
Wu Xin-Ji
Xia Xiao-Yang
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