Bülent Kiziltan and Stephen E. Thorsett 2009 ApJ 693 L109 doi:10.1088/0004-637X/693/2/L109
CONSTRAINTS ON PULSAR EVOLUTION: THE JOINT PERIOD-SPIN-DOWN DISTRIBUTION OF MILLISECOND PULSARS
FREE ISSUEBülent Kiziltan and Stephen E. Thorsett
Show affiliationsWe calculate the joint period-spin-down (P-
) distributions of millisecond radio pulsars (MSRPs) for the standard evolutionary model in order to test whether the observed MSRPs are the unequivocal descendants of millisecond X-ray pulsars (MSXPs). The P-
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-
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.
- Keywords
pulsars: general; pulsars: individual (B1937+21); stars: neutron; stars: statistics; X-rays: binaries
- PACS
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97.10.Cv Stellar structure, interiors, evolution, nucleosynthesis, ages
97.10.Ld Magnetic and electric fields; polarization of starlight
- Subjects
- Dates
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Issue 2 (2009 March 10)
Received 2008 November 10, accepted for publication 2009 January 27
Published 2009 February 19
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Constraints on Pulsar Evolution: The Joint Period-Spin-Down Distribution of Millisecond Pulsars
Bülent Kiziltan and Stephen E. Thorsett 2009 ApJ 693 L109
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