Birth and evolution of isolated radio pulsars

Claude André Faucher-Giguère*, Victoria M. Kaspi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We investigate the birth and evolution of isolated radio pulsars using a population synthesis method, modeling the birth properties of the pulsars, their time evolution, and their detection in the Parkes and Swinburne Multibeam (MB) surveys. Together, the Parkes and Swinburne MB surveys [1, 2] have detected nearly 2/3 of the known pulsars and provide a remarkably homogeneous sample to compare with simulations. New proper motion measurements [3, 4] and an improved model of the distribution of free electrons in the interstellar medium, NE2001 [5], also make revisiting these issues particularly worthwhile. We present a simple population model that reproduces the actual observations well, and consider others that fail. We conclude that: pulsars are born in the spiral arms, with the birthrate of 2.8±0.5 pulsars/century peaking at a distance ∼3kpc from the Galactic centre, and with mean initial speed of 380 -60+40kms-1; the birth spin period distribution extends to several hundred milliseconds, with no evidence of multimodality, implying that characteristic ages overestimate the true ages of the pulsars by a median factor >2 for true ages <30,000yr; models in which the radio luminosities of the pulsars are random generically fail to reproduce the observed P-Ṗ diagram, suggesting a relation between intrinsic radio luminosity and (P,Ṗ); radio luminosities L∝Ė provides a good match to the observed P-Ṗ diagram; for this favored radio luminosity model, we find no evidence for significant magnetic field decay over the lifetime of the pulsars as radio sources (∼100Myr).

Original languageEnglish (US)
Title of host publication40 Years Of Pulsars
Subtitle of host publicationMillisecond Pulsars, Magnetars and More
Pages607-609
Number of pages3
Volume983
DOIs
StatePublished - Mar 20 2008
Event40 Years Of Pulsars: Millisecond Pulsars, Magnetars and More - Montreal, QC, Canada
Duration: Aug 12 2007Aug 17 2007

Other

Other40 Years Of Pulsars: Millisecond Pulsars, Magnetars and More
CountryCanada
CityMontreal, QC
Period8/12/078/17/07

Keywords

  • Evolution
  • Population
  • Pulsars
  • Radio

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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