arXiv 0902.06042009-02-04astro-ph.GAastro-ph.SR

Constraints on Pulsar Evolution: The Joint Period-Spindown Distribution of Millisecond Pulsars

Bulent Kiziltan, Stephen E. Thorsett

备注：: 11 pages, 2 figures, accepted by ApJL
DOI：: 10.1088/0004-637X/693/2/L109

英文摘要：

We calculate the joint period-spindown (P-Pdot) distributions of millisecond radio pulsars (MSRP) for the standard evolutionary model in order to test whether the observed MSRPs are the unequivocal descendants of millisecond X-ray pulsars (MSXP). The P-Pdot densities implied by the standard evolutionary model compared with observations suggest that there is a statistically significant overabundance of young/high magnetic field MSRPs. Taking biases due to observational selection effects into account, it is unlikely that MSRPs have evolved from a single coherent progenitor population that loses energy via magnetic dipole radiation after the onset of radio emission. By producing the P-Pdot probability map, we show with more than 95% confidence that the fastest spinning millisecond pulsars with high magnetic fields, e.g. PSR B1937+21, cannot be produced by the observed MSXPs within the framework of the standard model.

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